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Publication details
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Further information about Mercedes-Benz vehi-
cles and about Daimler AG can be found on the
following websites:
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You are welcome to forward any queries or sug- gestions you may have regarding this Operator's
Manual to the technical documentation team at the following address:
Customer Assistance Center
Mercedes-Benz USA, LLC
3 Mercedes Drive
Montvale, NJ 07645-0350 © Daimler AG: not to be reprinted, translated or
otherwise reproduced, in whole or in part, with- out written permission from Daimler AG. Vehicle manufacturer
Daimler AG
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70327 Stuttgart
Germany
Symbols
Registered trademarks:
R Bluetooth ®
is a registered trademark of Blue-
tooth SIG Inc.
R DTS™ is a registered trademark of DTS, Inc.
R Dolby ®
and MLP™ are registered trademarks
of DOLBY Laboratories.
R BabySmart™, ESP ®
and PRE-SAFE ®
are reg-
istered trademarks of Daimler AG.
R HomeLink ®
is a registered trademark of John-
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R iPod ®
and iTunes ®
are registered trademarks
of Apple Inc.
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is a registered trademark of Harman
International Industries.
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and Windows media ®
are regis-
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In this Operator's Manual you will find the fol-
lowing symbols: G
WARNING
Warning notes make you aware of dangers
which could pose a threat to your health or
life, or to the health and life of others. H
Environmental note
Environmental notes provide you with infor-
mation on environmentally aware actions or
disposal.
! Notes on material damage alert you to dan-
gers that could lead to damage to your vehi-
cle.
i Practical tips or further information that
could be helpful to you.
X This symbol indicates an instruction
that must be followed.
X Several of these symbols in succession
indicate an instruction with several
steps. (Y
page)
This symbol tells you where you can find
more information about a topic.
YY This symbol indicates a warning or an
instruction that is continued on the next
page.
Dis‐ Dis‐
play play This text indicates a message on the
multifunction display/multimedia dis-
play.
As at 25.09.2017

Engaging park position automati-
cally ............................................... 144
Engaging reverse gear ................... 144
Engaging the park position ............ 144
Important safety note s.................. 143
Kickdown ....................................... 146
Manual shifting .............................. 147
Oil temperature (on-board com-
puter, Mercedes-AMG vehicles) ..... 241
Overview ........................................ 143
Problem (malfunction) ................... 150
Pulling away ................................... 138
Starting the engine ........................ 137
Steering wheel paddle shifters ...... 147
Trailer towing ................................. 146
Transmission position display ........ 145
Transmission positions .................. 145
Automatic transmission emer-
gency mode ....................................... 150
AUX jacks
CD/DVD drive ............................... 294
Axle load, permissible (trailer tow-
ing) ...................................................... 394 B
Back button ....................................... 288
Bag hook ............................................ 300
Ball coupling
Installing ........................................ 222
Removing ....................................... 225
BAS (Brake Assist System) ................. 67
Battery (SmartKey)
Checking .......................................... 80
Important safety notes .................... 80
Replacing ......................................... 80
Battery (vehicle)
Charging ........................................ 342
Display message ............................ 258
Important safety notes .................. 340
Jump starting ................................. 343
Overview ........................................ 340
Replacing ....................................... 343
Belt
see Seat belts
Belt warning ......................................... 48
Bicycle rack ....................................... 226 Blind Spot Assist
Activating/deactivating ................. 238
Display message ............................ 265
Notes/function .............................. 206
Trailer towing ................................. 207
see Active Blind Spot Assist
BlueTEC
Adding DEF .................................... 153
BlueTEC (DEF) .................................... 386
Bluetooth ®
Searching for a mobile phone ........ 291
Searching for a mobile phone
(device manager) ........................... 292
see also Digital Operator's Man-
ual .................................................. 287
Telephony ...................................... 291
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 250
Notes ............................................. 388
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Display message ............................ 256
Brake linings
Display message ............................ 250
Brakes
ABS .................................................. 66
BAS .................................................. 67
Brake fluid (notes) ......................... 388
Braking assistance appropriate to
the situation ..................................... 69
Display message ............................ 245
High-performance brake system .... 163
Hill start assist ............................... 139
Important safety notes .................. 161
Maintenance .................................. 162
Parking brake ................................ 157
Riding tips ...................................... 161
Warning lamp ................................. 276
Braking assistance appropriate to
the situation
Function/note s................................ 69
Breakdown assistance
Where will I find...? ........................ 334
see Flat tire 6
Index

Mercedes-Benz Intelligent Drive
360°camera .................................. 199
Active Blind Spot Assist ................. 209
Active Distance Assist
DISTRONIC ................................... .171
Active Distance Assist
DISTRONIC with Active Steering
Assist ............................................. 177
Active Lane Keeping Assist ............ 211
Active Parking Assist ..................... 191
ATTENTION ASSIST ........................ 203
Blind Spot Assist ............................ 206
General notes ................................ 169
Lane Keeping Assist ..................... .207
Parking Assist PARKTRONIC .......... 188
PRE-SAFE ®
PLUS (anticipatory
occupant protection PLUS) .............. 59
Rear view camera .......................... 195
Traffic Sign Assist .......................... 205
Message memory (on-board com-
puter) ................................................. .244
Mirror
Vanity mirror (sun visor) ................ 305
Mirror turn signal
Cleaning ......................................... 330
Mirrors
see Exterior mirrors
see Rear-view mirror
see Vanity mirror (in the sun visor)
Mobile phone
Connecting (Bluetooth ®
inter-
face) .............................................. 291
Connecting (device manager) ....... .292
Frequencies ................................... 381
Installation ..................................... 381
Menu (on-board computer) ............ 236
Transmission output (maximum) .... 381
Modifying the programming
(SmartKey) .......................................... .79
MOExtended tires .............................. 336
Mounting wheels
Lowering the vehicle ...................... 375
Mounting a new wheel ................... 374
Preparing the vehicle .................... .372
Raising the vehicle ......................... 373
Removing a wheel .......................... 374 Securing the vehicle against roll-
ing away ........................................ 372
MP3
Operation ....................................... 235
see also Digital Operator's Man-
ual ................................................. .287
Multifunction display
Function/notes ............................ .231
Permanent display ......................... 239
Multifunction steering wheel
Operating the on-board computer .. 230
Overview .......................................... 38
Multimedia system
Switching on and off ..................... .288
Music files
see also Digital Operator's Man-
ual ................................................. .287 N
Navigation Entering a destination .................... 289
Menu (on-board computer) ............ 233
see also Digital Operator's Man-
ual ................................................. .287
Notes on breaking-in a new vehi-
cle ....................................................... 134 O
Occupant Classification System
(OCS) Conditions ....................................... 52
Faults ............................................... 55
Operation ......................................... 52
System self-test ............................... 54
Occupant safety
Air bags .......................................... .49
Automatic measures after an acci-
dent ................................................. 59
Belt warning ..................................... 48
Children in the vehicle ..................... 59
Important safety note s.................... 44
Introduction to the restraint sys-
tem .................................................. 44
Occupant Classification System
(OCS) ............................................... 51
PASSENGER AIR BAG indicator
lamps ............................................... 45 Index
15

0043
Rear seats
The three red indicator lamps in the button indicate the heating level you have selected.
The system automatically switches down from level 3to level 2after approximately eight minutes.
The system automatically switches down from level 2to level 1after approximately ten minutes.
The system automatically switches off approximately 35 minutes after it is set to level 1.
X Turn the SmartKey to position 0047or0048 in the ignition lock (Y page 135).
X To switch on: press button0043repeatedly until the desired heating level is set.
X To switch off: press button0043repeatedly until all the indicator lamps go out.
i If the battery voltage is too low, the seat heating may switch off.
Activating/deactivating seat ventilation The three blue indicator lamps in the buttons indicate the blower setting you have selected.
X Turn the SmartKey to position 0047or0048 in the ignition lock (Y page 135).
X To switch on: press button0043repeatedly until the desired blower setting is set.
X To switch off: press button0043repeatedly until all the indicator lamps go out.
i If the battery voltage is too low, the seat ventilation may switch off.
i You can open the side windows and the sliding sunroof using the "Convenience opening" feature
(Y page 89). The seat ventilation of the driver's seat automatically switches to the highest level. 102
SeatsSeats
, steering wheel and mirrors

The blue
0057indicator lamp in the instru-
ment cluster lights up when the high-beam
headlamps are switched on.
X To switch off the high-beam headlamps:
move the combination switch back to its nor- mal position.
The blue 0057indicator lamp in the instru-
ment cluster goes out.
Vehicles with Adaptive Highbeam Assist: if
Adaptive Highbeam Assist is activated, it auto-
matically controls activation and deactivation of
the high-beam headlamps (Y page 113).Hazard warning lamps
X
To switch on the hazard warning lamps:
press button
0043.
All turn signals flash. If you now switch on a
turn signal using the combination switch, only the turn signal lamp on the corresponding
side of the vehicle will flash.
X To switch off the hazard warning lamps:
press button
0043.
The hazard warning lamps automatically switch
on if:
R an air bag is deployed or
R the vehicle decelerates rapidly from a speed
of above 45 mph (70 km/h) and comes to a
standstill
The hazard warning lamps switch off automati-
cally if the vehicle reaches a speed of above
6 mph (10 km/h) again after a full brake appli-
cation.
i The hazard warning lamps still operate if the
ignition is switched off. Intelligent Light System
General notes The Intelligent Light System is a system that
adjusts the headlamps automatically to suit the
prevailing driving and weather conditions. It
offers advanced functions for improved illumi-
nation of the road surface, e.g. depending on the vehicle speed or weather conditions. The sys-
tem includes the active light function, corneringlight function, highway mode and extended
range fog lamps. The system is only active when it is dark.
You can activate or deactivate the "Intelligent
Light System" using the on-board computer
(Y page 239).
Active light function The active light function is a system that moves
the headlamps according to the steering move- ments of the front wheels. In this way, relevant
areas remain illuminated while driving. This
allows you to recognize pedestrians, cyclists
and animals sooner.
Active: when the lights are switched on.
Vehicles with Lane Keeping Assist: the active
light function evaluates the course of the lane in which you are driving and adjusts the light in
advance.
Cornering light function The cornering light function improves the illu-
mination of the road over a wide angle in the
direction you are turning, enabling better visi-
bility in tight bends, for example. It can only be
activated when the low-beam headlamps are
switched on.
Active:
R if you are driving at speeds below 25 mph
(40 km/h) and switch on the turn signal or
turn the steering wheel
R if you are driving at speeds between 25 mph
(40 km/h) and 45 mph (70 km/h) and turn
the steering wheel
The cornering lamp may remain lit for a short
time, but is automatically switched off after no
more than three minutes.
Cornering light function with traffic circle
function: 112
Exterior lightingLights and windshield wipers

Problems with fuel and the fuel tank
Problem
Possible causes/consequences and
0050
0050Solutions Fuel is leaking from the
vehicle.
G
WARNING
The fuel line or the fuel tank is faulty.
Risk of explosion or fire. X Apply the electric parking brake.
X Switch off the engine.
X Remove the SmartKey from the ignition lock.
or, in vehicles with KEYLESS-GO start-function or KEYLESS ‑GO
X Open the driver's door.
The vehicle electronics are now in key position 0092. This is the same
as the SmartKey having been removed.
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The engine does not
start. The fuel tank of a vehicle with a diesel engine has been run completely
dry.
X Refuel the vehicle with at least 5.3 US qt (5 liters) of diesel.
X Turn the ignition on for approximately ten seconds (Y page 135).
X Start the engine continuously for up to ten seconds until it runs
smoothly.
If the engine does not start:
X Turn the ignition on again for approximately ten seconds
(Y page 135).
X Start the engine again continuously for up to ten seconds until it
runs smoothly.
If the engine does not start after three attempts:
X Consult a qualified specialist workshop. The fuel filler flap cannot
be opened. The fuel filler flap is not unlocked.
X Unlock the vehicle (Y page 77). The SmartKey battery is discharged or nearly discharged.
X Unlock the vehicle using the mechanical key (Y page 79). The fuel filler flap is unlocked, but the opening mechanism is jammed.
X Consult a qualified specialist workshop. DEF (BlueTEC vehicles only)
General notes To function properly, BlueTEC exhaust gas after-
treatment must be operated with the reducing
agent DEF. Adding DEF is one of the tasks per-
formed during maintenance. When the supply of DEF is almost used up, the
Check Additive See Operator's Manual
Check Additive See Operator's Manual
message is shown in the multifunction display.
If you drive the vehicle faster than 10 mph
(16 km/h), the Check Additive See Opera‐ Check Additive See Opera‐
tor's Manual
tor's Manual message goes out after approx-
imately one minute. Refueling
153Driving and parking Z

When the DEF supply drops to a minimum, the
Remaining Starts: 16
Remaining Starts: 16 message is shown in
the multifunction display.
If the Remaining Starts: 16
Remaining Starts: 16 message
appears in the multifunction display, you can
start the engine another 16 times. If DEF is not
refilled, you will subsequently be unable to
start the engine.
X Add at least 2 gal (7.5 l)of DEF.
X Switch on the ignition for at least 60 seconds.
X Start the engine.
i The DEF range shown depends strongly on
the driving style and operating conditions.
The actual range can therefore deviate from
the calculated range. The DEF consumption is
between 1% and 5% of the fuel consumption.
i Have the DEF tank refilled at a qualified spe-
cialist workshop.
Use the special DEF refill bottle when adding
DEF between maintenance intervals. You can
obtain further information from an authorized
Mercedes-Benz Center or, if necessary, contact
Roadside Assistance (Y page 29).
If the outside temperature is below 12 ‡
(00F811 †), it may be difficult to top up. If DEF is
frozen and there is an active warning indicator, it
may not be possible to add DEF. Park the vehicle in a warmer place, e.g. in a garage, until DEF has become fluid again. It will then be possible to
add DEF again. Alternatively, have the DEF tank
refilled at a qualified specialist workshop.
Further information about BlueTEC exhaust gas
aftertreatment and DEF is available at any
authorized Mercedes-Benz Center.
Important safety notes DEF is a water-soluble fluid for the exhaust gas
aftertreatment of diesel engines. It is:
R Not poisonous
R Colorless and odorless
R Not flammable
When you open the DEF container, small
amounts of ammonia vapor may be released.
Ammonia vapors have a pungent odor and are
particularly irritating to the skin, to mucous
membranes and to the eyes. You may experi-
ence a burning sensation in your eyes, nose and throat. Coughing and watering of the eyes are
possible. Do not inhale ammonia vapors. Fill the DEF tank
only in well-ventilated areas.
DEF must not come into contact with your skin,
eyes or clothing and must not be swallowed.
Keep DEF away from children.
If you or other persons come into contact with
DEF, observe the following:
R Rinse DEF from your skin immediately with
soap and water.
R If DEF comes into contact with your eyes,
immediately rinse them thoroughly with clean
water. Seek medical assistance without
delay.
R If DEF has been swallowed, rinse your mouth
out immediately. Drink plenty of water. Seek
medical assistance without delay.
R Change out of clothing contaminated with
DEF immediately.
! Only use DEF in accordance with
ISO 22241. Do not mix any additives with
DEF, and do not dilute DEF with water. This
may destroy the BlueTEC exhaust gas after-
treatment system.
! The vehicle must be parked on level ground
to fill the DEF tank. The DEF tank can only be filled as intended with the vehicle parked on a
level surface. This avoids false level readings.
Filling the tank is not permitted if the vehicle
is not parked on a level surface. There is a
danger of overfilling, which could result in
damage to components of the BlueTEC
exhaust gas aftertreatment.
! Immediately rinse off surfaces which come
into contact with DEF or remove DEF with a
damp cloth and cold water. If DEF has already crystallized, clean using a sponge and cold
water. DEF residue crystallizes after a short
period and contaminates the affected surfa-
ces. Furthermore, electrical components in
the vicinity may be damaged by DEF.
! DEF is not a fuel additive and must not be
added to the fuel tank. If DEF is added to the
fuel tank, this can lead to engine damage.
For further information on DEF, see
(Y page 386). 154
RefuelingDriving and parking

Opening/closing the DEF filler cap
The fuel filler flap is unlocked or locked auto-
matically when you open or close the vehicle
with the SmartKey or with KEYLESS-GO.
X To open: switch the ignition off.
X Press the fuel filler flap in the direction of
arrow 0043.
The fuel filler flap swings up.
X Turn blue DEF fuel filler cap 0044counter-clock-
wise and remove it.
DEF filler cap 0044is secured with a plastic
strip.
X To close: place DEF filler cap 0044on the filler
neck and turn it clockwise.
X To close the fuel filler flap, press it in the
direction of arrow 0043.
X Drive faster than 10 mph (16 km/h).
The Check Additive See Operator's
Check Additive See Operator's
Manual Manual message disappears after approx-
imately one minute.
i If the
Check Additive See Operator's
Check Additive See Operator's
Manual
Manual message continues to be shown on
the multifunction display, you must add more
DEF.
DEF refill canisters !
Do not screw the disposable hose on too
tight. The disposable hose could otherwise be damaged and DEF may leak out. X
Unscrew the cap from the opening on top of
DEF refill canister 0044.
X Place disposable hose 0043on the opening of
DEF refill canister 0044and screw it on clock-
wise until hand-tight.
Disposable hose 0043remains closed until you
fasten disposable hose 0043to the DEF filler
neck of the vehicle. X
Place disposable hose 0043on the filler neck on
the vehicle and screw it on clockwise until
hand-tight. When you feel resistance, dispos- able hose 0043is sufficiently secured.
X Lift up and tip DEF refill canister 0044.
Filling stops when the DEF tank is completely
filled. Do not fill the DEF tank any further. DEF
refill canister 0044can be removed when it has
been only partially emptied.
X Turn disposable hose 0043on the filler neck of
the vehicle counter-clockwise and remove it.
X Turn disposable hose 0043on the opening of
DEF refill canister 0044counter-clockwise and
remove it.
X Reseal DEF refill canister 0044with the cap.
DEF refill canisters are available at many gas
stations or at a qualified specialist workshop.
DEF refill canisters are often sold with a filler
hose. A filler hose that does not exactly fill the
vehicle's DEF tank offers no protection against Refueling
155Driving and parking Z

Familiarize yourself with the characteristics of
your vehicle and the gear shift operation before
driving through difficult terrain.
The following driving systems are specially
adapted to off-road driving:
R The Off-road drive program (vehicles without
Off-Road Engineering package)
(Y page 215)
R Off-road andOff-road Plus drive programs
(vehicles with Off-Road Engineering package) (Y page 216)
R LOW RANGE off-road gear (vehicles with the
Off-Road Engineering package)
(Y page 217)
R Differential lock (vehicles with the Off-Road
Engineering package) (Y page 217)
R Off-road ABS (Y page 67)
R Off-road 4ETS (Y page 70)
R Off-road ESP ®
(Y page 72)
R AIRMATIC package (vehicle level)
(Y page 183)
R DSR (Downhill Speed Regulation)
(Y page 214)
Observe the following notes:
R Stop the vehicle before starting to drive along
an off-road route. If necessary, select the off- road program (Y page 216) or shift to the
LOW RANGE off-road gear (Y page 217).
R Select a vehicle level that is suitable for the
terrain. To avoid damaging the vehicle, make
sure there is always sufficient ground clear-
ance.
R Check that items of luggage and loads are
stowed safely and are well secured
(Y page 299).
R Always keep the engine running and in gear
when driving on a downhill gradient. Activate
DSR (Y page 214).
R Always keep the engine running and in gear
when driving down an incline.
R Adapt your speed to the terrain. The rougher,
steeper or more ruts on the terrain, the slower your speed should be.
R Do not jump with the vehicle as this will inter-
rupt the vehicle's propulsion.
R Drive with extreme care on unfamiliar off-road
routes where visibility is poor. For safety rea- sons, get out of the vehicle first and survey
the off-road route. R
Look out for obstacles, such as rocks, holes,
tree stumps and furrows.
R Take care when turning on an uphill or down-
hill slope or when driving across a slope. The
vehicle could otherwise tip over.
R Always keep the doors, the tailgate, the side
windows and the sliding sunroof closed while
the vehicle is in motion.
R Do not shift the automatic transmission to
position 005C.
R Observe the notes on off-road fording
(Y page 164).
i Information about retrofitting special all-ter-
rain tires is available from any qualified spe-
cialist workshop.
i Do not use the HOLD function when driving
off-road, on steep uphill or downhill gradients
or on slippery or loose surfaces. The HOLD
function cannot hold the vehicle on such sur- faces.
Checklist before driving off-road !
If the engine oil warning lamp lights up while
the vehicle is in motion, stop the vehicle in a
safe place as soon as possible. Check the
engine oil level. The engine oil warning lamp
warning must not be ignored. Continuing the
journey while the symbol is displayed could
lead to engine damage.
X Engine oil level: check the engine oil level
and add oil if necessary.
When driving on steep gradients, the engine
oil level must be sufficiently high to ensure a
correct oil supply in the vehicle.
X DEF tank (BlueTEC vehicles): check the
level and add if necessary (Y page 153).
X Tire-changing tool kit: check that the jack is
working and make sure you have the lug
wrench, a robust tow cable and a folding
spade in the vehicle.
X Wheels and tires: check the tread depth and
pressure of the tires.
X Check for damage and remove any foreign
objects, e.g. small stones, from the wheels/
tires.
X Replace any missing valve caps.
X Replace dented or damaged wheels.
X Rims: dented or bent rims can result in a loss
of tire pressure and damage the tire bead. 166
Driving tipsDriving and parking

Telephone menu
Introduction G
WARNING
If you operate information systems and com-
munication equipment integrated in the vehi- cle when driving, you may be distracted from
the traffic situation. You could also lose con-
trol of the vehicle. There is a risk of an acci-
dent.
Only operate this equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
When telephoning, you must observe the legal
requirements for the country in which you are
currently driving.
X Switch on the mobile phone (see the manu-
facturer’s operating instructions).
X Switch on the multimedia system (see the
Digital Operator's Manual)
X Establish a Bluetooth ®
connection to the mul-
timedia system (see the Digital Operator's
Manual).
X Press the 0059or0065 button on the steering
wheel to select the Tel Telmenu.
You will see one of the following display mes-
sages in the multifunction display:
R Phone READY Phone READY or the name of the network
provider: the mobile phone has found a net-
work and is ready to receive.
R Phone No Service
Phone No Service: there is no network
available or the mobile phone is searching for
a network.
Accepting a call If someone calls you when you are in the
Tel Tel
menu, a display message appears in the multi-
function display.
You can accept a call at any time regardless of
the menu selected.
X Press the 0061button on the steering wheel
to accept an incoming call. Rejecting or ending a call You can end or reject a call even if you are not in
the Tel Tel menu.
X Press the 0076button on the steering wheel
to reject or end a call.
Selecting an entry from the phone book X
Press the 0059or0065 button on the steering
wheel to select the Tel
Telmenu.
X Press the 0063,0064or0076 button to
switch to the phone book.
X Authorize access to the phone book on the
phone.
X Press the 0063or0064 button to select the
desired name.
or
X To start rapid scrolling: press and hold the
0063 or0064 button for longer than one sec-
ond.
Rapid scrolling stops when you release the
button or reach the end of the list.
X If only one telephone number is stored for
a name: press the 0061or0076 button to
start dialing.
or X If there is more than one number for a
particular name:
press the0061or0076
button to display the numbers.
X Press the 0063or0064 button to select the
number you want to dial.
X Press the 0061or0076 button to start dialing.
or
X To exit the telephone book: press the0076
or 0038 button.
Redialing The on-board computer saves the last names or
numbers dialed in the redial memory.
X Press the 0059or0065 button on the steering
wheel to select the Tel Telmenu.
X Press the 0061button to switch to the redial
memory.
X Press the 0063or0064 button to select the
desired name or number. 236
Menus and submenusOn-board computer and displays