ECU MERCEDES-BENZ E-CLASS SALOON 2021 Repair Manual

Ext
Ext
ending and re
ending and retr
tracting t
acting t he ball nec
he ball nec k full
k fully electr
y electr i-
i-
call
call y (multimedia syst
y (multimedia syst em)
em) &
W
WARNING
ARNING Risk of accident due tothe ball
neck not being engaged
If th e ball neck is not engaged, the trailer may
come loose. #
Always engage the ball neck as descri-
bed. *
N
NO OTE
TE Damage tothe all-electric trailer
hitch due toadditional pressure The all-elect
ric trailer hitch could be mechani-
cally damaged byapplying additional pressure
when the ball neck is being extended or
re tracted. #
Do not make the ball neck extend/
re tract faster byapplying additional pres-
sure. R
R
eq
eq uir
uir ements:
ements:
R The vehicle is secured against rolling away.
R The swivel range is clear. R
The trailer cables or ada pter plugs ha vebeen
re mo ved.
Multimedia system: 4 © 5
Settings 5
Quick access
Ext
Ext ending t
ending t he ball nec
he ball nec k full
k full y electr
y electr ically
ically #
Select Ü.
The Trailer coupling extending… display mes-
sage will appear on the multifunction displa y.
The ball neck will extend fully electricall y. #
Wait until the ball neck has loc ked in place.
If th e ball neck is not securely loc ked in place, the
Check trailer hitch lock message will appear on
th e multifunction displa y.
R
R e
etr
tr acting t
acting t he ball nec
he ball nec k full
k fully electr
y electr ically
ically #
Select Ü.
The Trailer coupling extending… display mes-
sage will appear on the multifunction displa y.
The ball neck will retract fully electricall y. #
Wait until the ball neck has loc ked in place. If
th e ball neck is not securely loc ked in place, the
Check trailer hitch lock message will appear on
th e multifunction displa y. Coupling up/uncoupling a tr
Coupling up/uncoupling a tr
ailer
ailer &
W
WARNING
ARNING Risk of injury due toach ange
in vehicle le vel
V
V ehicles wit
ehicles wit h lev
h level contr
el contr ol:
ol:theve hicle le vel
may be changed unintentionall y,e.g. by ot her
people. If you couple or uncouple the trailer
during this time, you may become trapped. In
addition, other people could become trapped
if parts of their body are between theve hicle
body and the tyres or underneath theve hicle.
Obser vethefo llowing when coupling or
uncoupling: #
Do not open or close any doors or the
boot lid. #
Do not initiate the le vel control and do
not operate theDY NAMIC SELECT
switch. #
Do not lo ckor unlock theve hicle. Driving and parking
275
275

R
R
eq
eq uir
uir ements:
ements:
R The ball neck is extended and engaged in a
securely loc ked position.
Tr ailers with a 7-pin plug can be connected tothe
ve hicle with thefo llowing adap ters:
R Adapter plug
R Adapter cable
The trailer will be cor rectly de tected bytheve hi-
cle only if thefo llowing conditions are met:
R The trailer is connected cor rectl y.
R The trailer lighting system is in working order.
The functions of thefo llowing systems will be
a.ec tedbya cor rectly connected trailer:
R ESP ®
trailer stabilisation
R Trailer Manoeuvering Assist
R Active Lane Keeping Assist
R Parking Assist PARKTRONIC
R Active Parking Assist
R Blind Spot Assist or Active Blind Spot Assist
R Drive Away Assist R
Cross Tra1c Ale rt
R Reversing camera
R 360° camera
R AIR BODY CONTROL
Coupling up a tr
Coupling up a tr ailer
ailer
* NO
NOTE
TEDamage tothe star ter battery due
to full dis charge Charging
the trailer battery using the po wer
supply of the trailer can damage the star ter
batter y. #
Do not use theve hicle's po wer supply to
ch arge the trailer batter y. #
Remo vethe co ver cap from the ball head and
store it in a safe place. #
Position the trailer on a le vel sur face behind
th eve hicle and couple it up totheve hicle. #
Open the soc ket cap. #
Inse rtthe plug with lug 1ingroo ve 3 on
th e soc ket. #
Turn bayonet coupling 2totheright as far as
it will go. #
Let the cap engage. #
Secure the cable tothe trailer with cable ties
(only if you are using an adap ter cable). #
Make sure that the cable is alw ays slack for
ease of mo vement during cornering. 276
276
Driving and parking

Under
thefo llowing conditions, a message may
appear on the inst rument display even if the
trailer has been connec ted cor rectl y:
R LEDs ha vebeen ins talled in the trailer lighting
system.
R The cur rent has fallen below the trailer lighting
system's minimum cur rent (50 mA).
% Accessories can be connected tothe perma-
nent po wer supply up to180 W and tothe
po we r supply that is switched on via the igni-
tion loc k.
U
U ncoupling a tr
ncoupling a tr ailer
ailer &
W
WARNI NG
ARNI NGRisk of being crushed and
becoming trapped when uncoupling a
trailer
When uncoupling a trailer with an engaged
inertia-activated brake, your hand may
become trapped between theve hicle and the
trailer dr awbar. #
Do not uncouple trailers with an engaged
ove rrun brake. *
N
NOOTE
TE Damage when uncoupling in a state
of ove rrun Uncoupling in a state of
overrun can damage
th eve hicle. #
Do not uncouple trailers with an engaged
ove rrun brake. &
W
WARNING
ARNING Risk of becoming trapped when
disconnecting the trailer cable
V
V ehicles wit
ehicles wit h lev
h level contr
el contr ol syst
ol system:
em:Thevehicle
may lo wer when the trailer cable is disconnec-
te d.
This could result in you or other people
becoming trapped if your or their limbs are
between theve hicle body and the tyres or
underneath theve hicle. #
Make sure that nobody is underneath the
ve hicle or in the immediate vicinity of the
wheel ar ches when you disconnect the
trailer cable. *
N
NOOTE
TE Damage tothere ar bumper from
ins talling adap ter cables or adap ter plugs The
following parts could be damaged when
swiveling the ball neck fully electricall y:
R Bumper
R Adapter cable
R Adapter plug #
Alwaysre mo vethe adap ter cable or
adap ter plug before swiveling the ball
neck fully electricall y. #
Secure the trailer against rolling away. #
Disconnect the electrical connection between
th eve hicle and the trailer. #
Uncouple the trailer. #
Place the co ver cap on the ball head. Driving and parking
277
277

Bicy
Bicy
cle r
cle r ac
ack function
k function &
W
WARNI NG
ARNI NGRisk of an accident if the bicy-
cle rack is used incor rectly
The bicycle rack may become de tach ed from
th eve hicle in thefo llowing cases:
R the permissible load capacity of the trailer
hitch is exceeded.
R the bicycle rack is used incor rectl y.
R the bicycle rack is secured tothe ball neck
beneath the ball head.
Obser vethefo llowing foryo ur ow n sa fety and
th at of other road users:
R always adhere tothe permissible load
capacity of the trailer hitch.
R always obser vethe permissible rear axle
load of theto wing vehicle.
R use the bicycle rack only totransport bicy-
cles. R
always mount the bicycle rack proper lyby
attaching tothe ball head and the ball
neck guide pin, if possible.
R when transporting four bicycles, alw ays
use bicycle rack s which ha veadditional
support on the ball neck guide pin.
R use only bicycle rack s appr oved by
Mercedes-Benz.
R always obser vethe bicycle rack operating
instructions. *
N NOOTE TE Damage to, or crac kson, the trailer
hitch due tounsuitable bicycle rack s or
bicycle rack s being used inco rrectly #
use only bicycle rack s appr ovedby
Mercedes-Benz. *
N
NOOTE
TE Increased risk of damage toprop-
erty due tofolded-out ball neck #
When the trailer is not coupled or the
bicycle rack is attached, fold in the ball neck or, in
the case of a fully electric
trailer hitch, retract the ball nec k. Tr
ailer hitch (example with additional guide pin)
Depending on the bicycle rack 's design, di.erent
numbers of bicycles can be transpor ted. 278
278
Driving and parking

The
following bicycle rack designs are possible:
R When mounted byattaching toball head 1,
th e maximum load capacity is 75 kg. You can
transport up tothre e bicycles.
R When mounted on ball head 1and guide pin
2, the maximum load capacity is 100 kg. Yo u
can transport up tofour bicycles.
The maximum load capacity is calculate d fromthe
we ight of the bicycle rack and the bicycle rack
load.
Obser vethe no tes on driving with a roof load,
trailer or fully laden vehicle (/ page 172).
When using a bicycle rack , set the tyre pressure
fo r increased load on there ar axle of theve hicle.
Fu rther information on the tyre pressure can be
fo und in the tyre pressure table (/ page 397).
N
No ot tes on loading
es on loading
The lar gerth e distance between the load's centre
of grav ity and the ball head, thegre ater the load
on the trailer hitch. Obser
vethefo llowing no tes:
R mount heavy bicycles as close totheve hicle
as possible
R always distribute the load on the bicycle rack
as evenly as possible across theve hicle's lon-
gitudinal axis
Mercedes-Benz recommends removing all de tach-
able parts from bicycles (e.g. bask ets, ch ild seats,
re ch arge able batteries) before loading them onto
th e bicycle rack . This will impr ovethe aerody-
namic resis tance and centre of grav ity of the bicy-
cle rack.
Alw ays secure the bicycles toprev ent them from
moving around and check them at regular inter-
va ls to ensure that they are secure.
Do not use tarp aulins or other co vers. The driving
ch aracteristics and rear view may be impaired. In
addition, aerodynamic resis tance and the load on
th e trailer hitch will increase. Load distribution on
the bicycle rack
1 Vertical distance between centre of grav ity
and ball head
2 Horizontal distance between centre of grav ity
and ball head
3 The centre of grav ity is on theve hicle's cent re
axis
Obser vethefo llowing information when loading
th e bicycle rack: Driving and parking
279
279

support and
recuperation po wer of the elec-
tric mo tor)
Plug-in hybrid: cur rent state of charge ofthe
high- voltage battery
7 Selected drive prog ram
8 Selected transmission position
9 Centre display area of the inst rument display
(e xamp le: standard display for a trip): assis-
ta nce/telephone/navigation/trip/media/
ra dio/styles and displa ys/service/possible
settings for head-up display
A Fuel le vel and fuel /ller 0ap location indicator Ov
Ov
er
ervie
vie w of butt
w of butt ons on t
ons on the st
he steer
eering wheel
ing wheel
Depending on the equipment, the la yout and the
design of the control elements on the steering
wheel may di.er. 1
Control panel for cruise control/limiter or
Ac tive Distance Assist DISTRONIC
(/ page 226)
2 G Back button, on-boa rdcomputer
3 Touch Control, on-board computer
To navigate: swipe
To con/rm: press 0076
4 00E2 Main menu, on-board computer 5
00E2 Main menu, MBUX multimedia system
6 Touch Control, MBUX multimedia system
To navigate: swipe
To con/rm: press 0076
7 G Back button, MBUX multimedia system
8 Cont rol panel forth e MBUX multimedia sys-
tem
£ LINGU ATRO NIC (/ page 290)
9 Toadjust the brightness of the inst rument
lighting Oper Oper
ating t
ating t he on-boar
he on-boar d com
d com put
puter
er
Obser vethe legal requ irements forth e country in
which you are cur rently driving when ope rating
th e on-board computer. Instrument display and on-board computer
283
283

F
F
ull-scr
ull-scr een menus
een menus
Yo u can display thefo llowing menus full-screen on
th e inst rument displa y:
R Assistance
R Trip
R Navigation #
Onthe cor responding menu, use the leT-hand
To uch Control toscroll tothe end of the list. #
Press the leT-hand Touch Control.
The selected menu will be displa yed full-
screen. F
F
unction of t
unction of t he pow
he power met
er meter (plug-in h
er (plug-in h ybr
ybrid)
id) 1
Combustion engine and electric mo tor
switched o.
2 Position in the display range of there co vered
energy
3 Start of the display range of there cuperated
energy
4 End of the display range of the combined out-
put of thehy brid system
The po wer me ter has thefo llowing functions:
R The po wer me ter displa ys the output obtained
from thehy brid system. R
Area 2-3 shows th ere ga ined energy.
R When the po wer me ter needle is at position
1, theve hicle is switched o.. The combus-
tion engine and the electric mo tor are
switched o..
R Powe rra nge 3–4 show sth e combined
output of thehy brid system. F
F
unction of t
unction of t he electr
he electric mot
ic motor pow
or pow erav
er availability
ailability
displa
displa y (plug-in h
y (plug-in h ybr
ybrid)
id) 1
Start of the POWER display range
2 End of the POWER display range
3 Maximum recuperated energy Instrument display and on-board computer
285
285

4
Start of the display range of there cuperated
energy
5 Current state of charge ofthe high-voltage
battery
R In electric mode, the area 1-2 shows
what percentage of the electrical drive is cur-
re ntly being used. The combustion engine is
switched on at a percentage of 100%. If the
combustion engine is running, boost mode
sh ow sth e electrical po wer assistance of the
drive.
R The area 34shows th ere cuperation and
ch arging behaviour using the combustion
engine.
R From point 3,the maximum recuperated
energy has been reached.
R The cur rent state of charge of high-voltage
battery 5is displa yed.
% Due tovarious system limits, the displa yed
va lue in the area 34may temp orarily dif-
fe r slightly from the actual value. Displa
Displa
ying t
ying the pow
he pow er met
er meter (plug-in h
er (plug-in h ybr
ybrid)
id)
On-board computer: 4 Content #
Select Power meter. Ov Ov
er ervie
vie w of display
w of display s on t
s on the ins
he instr trument display
ument display
Displa yson the inst rument displa y:
u Active Parking Assist activated
(/ page 266)
é Parking Assist PARKTRONIC deactivated
(/ page 263)
h Cruise control (/ page 224)
00CB Limiter (/ page 225)
ç Active Distance Assist DISTRONIC
(/ page 228)
ê Active Brake Assist (/ page 242)
à Active Steering Assist (/ page 235)
¬ Active Stop-and-Go Assist (/ page 235)
00B0 Active Lane Keeping Assist (/ page 247)
õ PLUG‑IN HYBRID operation activated ñ
Operating mode, other operating mode dis-
pla ys
00E5 Electric range
° Haptic accelerator pedal
(/page 177, 182, 180)
ò Sound generator inoperative (/ page 446)
00D6 ECO start/stop function (/ page 175)
00D9 HOLD function (/ page 221)
00CE Adaptive Highbeam Assist (/ page 139)
Ad aptive Highbeam Assist Plus
(/ page 140)
ð Maximum permissible speed exceeded (for
cer tain countries only)
V
V ehicles wit ehicles wit h
hTr
Tra1c
a1c Sign Assist:
Sign Assist: detected instruc-
tions and tra1c signs (/ page 243).
Fo r an overview of the indicator and warning
lamps, see (/ page 499).286
286
Instrument display and on-board computer

-
Instrument lighting
- Displ aybrightness
- Edge lighting
- Day/night design
R Control elements
- Keyboard language and handwriting recog-
nition
- Sensitivity of theto uchpad
- Sensitivity of theTo uch Controls
R LINGU ATRO NIC
R Sound
- Enter tainment
- Navigation and tra1c announcements
- Telephone
- Voice ampli/cation tothere ar
R Connectivity
- Wi-Fi, Blue tooth ®
, NFC
R Time & date
R Language
R Units for distance R
SoTware updates
R Data import/export
R PIN pr otection
R System Reset Inf
Inf
or
ormation on im
mation on im port
portant syst
ant syst em updat
em updat es
es Impor
tant system updates may be necessary for
th e security of your multimedia system's data.
Install these updates, or else the security of your
multimedia system cannot be ensured.
A system update consists of thre e steps:
R Downloading or copying of the data requ ired
fo r installation
R Installation of the downloaded system update
R Activation of the downloaded system update
by restarting the system
% If automatic soTware updates are activated,
th e system updates will be downloaded auto-
maticall y.
The multimedia system pr ovides a message when
a system update is available. Yo
u ha vethefo llowing selection options:
R Accept and install
The system update will be downloaded in the
background.
R Information
Information about the pending system update
is displa yed.
R Later
The system update can be downloaded man-
ually at a later time.
Deep syst
Deep syst em updat em updates
es
Deep system updates access vehicle or system
settings and can therefore only be car ried out
when theve hicle is stationary and the ignition is
switched o..
If th e download of a deep system update is com-
ple ted and the downloaded system update is
re ady for installation, you will be informed of this
aTer the next ignition cycle, forex ample.
% Park theve hicle safely in a suitable location
before starting the installation. 322 322
MBUX multimedia system

Re
quirements forth e installation:
R The ignition is switched o..
R Notes and warnings ha vebeen read and
accep ted.
R The electric parking brake is applied.
If all requ irements ha vebeen ful/lled, the down-
loaded system update is installed. The multimedia
system cannot be operated while the downloaded
system update is being installed and vehicle func-
tions are restric ted.
If errors should occur during the installation, the
multimedia system automatically attem ptsto
re store the pr evious version. If restoration of the
pr ev ious version is not possible, a symbol appears
on the media displa y.Consult a quali/ed special-
ist workshop toresol vethe problem. Se
Se tting up a W
tting up a W i-F
i-Fi ho
i ho tspot
tspot R
R eq
eq uir
uir ements:
ements:
R T
To se
o se t up t
t up t he W
he Wi-F
i-Fi connection of t
i connection of t he multime-
he multime-
dia syst
dia syst em wit
em with e
h ext
xter
er nal ho
nal ho tspo
tspots:
ts:there is no
communication module installed. R
The device tobe connected supports at least
one of the types of connection described.
Multimedia system: 4 © 5
Settings 5
System
5 Wi-Fi & Bluetooth
A
A ctiv
ctiv ating/deactiv
ating/deactiv ating W
ating Wi-Fi
i-Fi #
Select Wi-Fi.
Connecting t
Connecting t he multimedia syst
he multimedia syst em wit
em with an e
h an ext
xter-
er-
nal ho
nal ho tspo
tspot using W
t using W i-Fi
i-Fi
The type of connection established must be selec-
te d on the multimedia system and on the device
to be connected.
% The connection procedure may di.er depend-
ing on the device. Follow the inst ructions that
are shown in the displa y.Fu rther information
can be found in the manufacturer's operating
inst ructions. #
Select Internet settings . #
Select Connect via Wi-Fi . #
Select Add hotspot. Connecting using a QR code Connecting using a QR code #
Select the options 0048ofthe desired Wi-Fi
networ k. #
Select Connect using a QR code. #
Scan the displa yed QR code with the device to
be connected.
The Wi-Fi connection is established.
Connecting using a secur Connecting using a secur itykey
ity key #
Select the options 0048ofthe desired Wi-Fi
networ k. #
Select Connect using security key. #
Have the security key displa yed on the device
to be connected (see the manufacturer's oper-
ating inst ructions). #
Enter this security key on the multimedia sys-
te m. #
Con/rm the entry with ¡.
Connecting using a WPS PIN
Connecting using a WPS PIN #
Select the options 0048ofthe desired Wi-Fi
networ k. MBUX multimedia system
323
323