MERCEDES-BENZ R320CDI 2007 R171 Owner's Manual

540 Technical data
Fuels, coolants, lubricants, etc.
Engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for
our service intervals. Therefore, only use
approved engine oils and oil filters re-
quired for vehicles with Maintenance
System (U.S. vehicles) or FSS PLUS
(Canada vehicles). For a listing of approved
engine oils and oil filters, refer to the Fac-
tory Approved Service Products pamphlet,
or contact an authorized Mercedes-Benz
Light Truck Center.Engine oil additives
Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from
blending oil additives are not covered by
the Mercedes-Benz Limited Warranty.
Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG
lubricating oil are used in the air condition-
ing system.
Never use R-12 (CFC) or mineral-based lu-
bricating oil. Otherwise damage to the
system will occur.
!Using engine oils and oil filters of
specification other than those expressly re-
quired for the Maintenance System
(U.S. vehicles) or FSS PLUS (Canada vehicles),
or changing of oil and oil filter at change intervals
longer than those called for by the Maintenance
System (U.S. vehicles) or FSS PLUS (Canada
vehicles) will result in engine or emission control
system damage not covered by the
Mercedes-Benz Limited Warranty.
Please follow Maintenance System
(U.S. vehicles) or FSS PLUS (Canada vehicles)
recommendations for scheduled oil changes.
Failure to do so could result in engine or
emission control system damage not covered by
the Mercedes-Benz Limited Warranty.

541 Technical data
Fuels, coolants, lubricants, etc.
Brake fluid
Only brake fluid approved by
Mercedes-Benz is recommended. Your
authorized Mercedes-Benz Light Truck
Center will provide you with additional
information.Premium unleaded gasoline
(gasoline engine)
Warning!G
During vehicle operation, the boiling point of
the brake fluid is continuously reduced
through the absorption of moisture from the
atmosphere. Under extremely strenuous
operating conditions, this moisture content
can lead to the formation of bubbles in the
system, thus reducing the system’s
efficiency.
Therefore, the brake fluid must be
replaced regularly. Refer to your vehicle’s
Maintenance Booklet for replacement
interval.
Warning!G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
injury.
Never allow sparks, flame or smoking mate-
rials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid in-
haling fumes and skin or clothing contact,
extinguish all smoking materials.
Direct skin contact with gasoline and the in-
halation of gasoline vapors are damaging to
your health.
!To maintain the engine’s durability and per-
formance, premium unleaded gasoline must be
used. If premium unleaded is not available and
low octane fuel is used, follow these precau-
tions:

Have the fuel tank only partially filled with
unleaded regular and fill up with premium
unleaded as soon as possible.

Avoid full throttle driving and abrupt acceler-
ation.

Do not exceed an engine speed of 3000 rpm
if the vehicle is loaded with a light load such
as two persons and no luggage.

Do not exceed2/3of maximum accelerator
pedal position if the vehicle is fully loaded or
operating in mountainous terrain.

542 Technical data
Fuels, coolants, lubricants, etc.
Gasoline additives (gasoline engine)
A major concern among engine manufac-
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build-up of carbon depos-
its.
After an extended period of using fuels
without such additives carbon deposits
can build up, especially on the intake
valves and in the combustion area, leading
to engine performance problems such as:

Warm-up hesitation

Unstable idle

Knocking/pinging

Misfire

Power lossIn areas where carbon deposits may be
encountered due to lack of availability of
gasolines which contain these additives,
Mercedes-Benz recommends the use of
additives approved by us for use on
Mercedes-Benz vehicles. Refer to Factory
Approved Service Products pamphlet for a
listing of approved product(s). Follow
directions on product label.
Do not blend other specific fuel additives
with fuel. This only results in unnecessary
costs and may be harmful to the engine
operation.
Damage or malfunction resulting from
poor fuel quality or from blending addition-
al fuel additives other than those tested
and approved by us for use on
Mercedes-Benz vehicles listed in the Fac-
tory Approved Service Products pamphlet
are not covered by the Mercedes-Benz
Limited Warranty.
Fuel requirements
Gasoline engine
Only use premium unleaded fuel.

The octane number (posted at the
pump) must be 91 min. It is an average
of both the Research (R) octane num-
ber and the Motor (M) octane number:
(R+M) /2). This is also known as the
ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not
exceed 10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is
not allowed. Gasohol, which contains
10% ethanol and 90% unleaded gasoline,
can be used.

543 Technical data
Fuels, coolants, lubricants, etc.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.
Diesel engine
Only use commercially available vehicular
diesel fuels No. 2 or No. 1 (ASTM D975 No.
2-D or No. 1-D).
To prevent malfunctions, diesel fuel with
improved cold flow characteristics is of-
fered in the winter months. Check with
your fuel retailer.Coolants
The engine coolant is a mixture of water
and anticorrosion/antifreeze, which
provides:

Corrosion protection

Freeze protection

Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -35°F (-37°C) and corro-
sion protection.
If the antifreeze mixture is effective to
-22°F (-30°C), the boiling point of the cool-
ant in the pressurized cooling system is
reached at approximately 266°F (130°C).
The coolant solution must be used year
round to provide the necessary corrosion
protection and increase boil-over protec-
tion. Refer to Maintenance Booklet for
replacement interval.Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the
Maintenance booklet is only applicable if
MB 325.0 anticorrosion/antifreeze solu-
tion or other Mercedes-Benz approved
products of equal specification (see
Factory Approved Service Products pam-
phlet) are used to renew the coolant con-
centration or bring it back up to the proper
level.
To provide important corrosion protection,
the solution must be at least 45% anticor-
rosion/antifreeze (equivalent to freeze
protection to approx. -22°F [-30°C]). If you
use a solution that is more than 55% anti-
corrosion/antifreeze (freeze protection to
approx. -49°F [-45°C]), the engine temper-
ature will increase due to the lower heat
transfer capability of the solution. There-
fore, do not use more than this amount of
anticorrosion/antifreeze.
!Do not fill the tank with gasoline. Do not
blend diesel fuel with gasoline or kerosine. The
fuel system and engine will otherwise be
damaged, which is not covered by the
Mercedes-Benz Limited Warranty.

544 Technical data
Fuels, coolants, lubricants, etc.
If the coolant level is low, water and
MB 325.0 anticorrosion/antifreeze should
be used to bring it up to the proper level
(have cooling system checked for signs of
leakage). Please make sure the mixture is
in accordance with label instructions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you
are not sure about the water quality, con-
sult an authorized Mercedes-Benz Light
Truck Center.

545 Technical data
Fuels, coolants, lubricants, etc.
Anticorrosion/antifreeze
Your vehicle contains a number of
aluminum parts. The use of aluminum
components in motor vehicle engines ne-
cessitates that anticorrosion/antifreeze
coolant used in such engines be
specifically formulated to protect the aluminum parts. (Failure to use such anti-
corrosion/antifreeze coolant will result in
a significantly shortened service life.)
Therefore, the following product is strongly
recommended for use in your vehicle:
Mercedes-Benz 325.0 anticorrosion/anti-
freeze agent.Before the start of the winter season (or
once a year in hot southern regions), you
should have the anticorrosion/antifreeze
concentration checked. The coolant is also
regularly checked each time you bring your
vehicle to an authorized Mercedes-Benz
Light Truck Center for service.
Anticorrosion/antifreeze quantity
Approx. freeze protection
Model–35°F (–37°C)–49°F (–45°C)
R 320 CDI5.0 US qt (4.75 l)5.5 US qt (5.2 l)
R3505.0 US qt (4.75 l)5.5 US qt (5.2 l)
R5005.6 US qt (5.25 l)6.1 US qt (5.8 l)
R63 AMG6.1US qt (5.75l)6.8 US qt (6.4 l)

546 Technical data
Fuels, coolants, lubricants, etc.
Windshield washer and headlamp
cleaning* system
Both the windshield washer and headlamp
cleaning* system are supplied from the
windshield washer fluid reservoir.
The windshield and headlamp washer fluid
reservoir has a capacity of approx.
8.0 US qt (7.6 l).
Refill the reservoir with MB Windshield
Washer Concentrate and water (or con-
centrate and commercially available
premixed windshield washer
solvent/antifreeze, depending on am-
bient temperatures).Windshield and headlamp washer fluid
mixing ratio
For temperatures above freezing point, use
MB Windshield Washer Concentrate
“MB SummerFit” and water:

1part “MBSummerFit” to 100parts
water
(1.34 fl oz [40 ml] “MB SummerFit” to
1gal [4.0l] water)
For temperatures below freezing point, use
MB Windshield Washer Concentrate
“MB SummerFit” and commercially avail-
able premixed windshield washer
solvent/antifreeze:

1 part “MB SummerFit” to 100 parts
solvent
(1.34 fl oz [40 ml] “MB SummerFit” to
1 gal [4.0 l] solvent)
Warning!G
Washer solvent/antifreeze is highly flamma-
ble. Do not spill washer solvent/antifreeze
on hot engine parts, because it may ignite
and burn. You could be seriously burned.

547 Index
A
ABS 100
Indicator lamp 420
Messages in the multifunction
display 435
Accelerator position, automatic
transmission 203
Accessory weight 401
Accident 64
Active head restraint 83, 137, 482
Air bags 74
Children 75, 86
Front, Driver 77
Front, Passenger 77
Messages in the multifunction
display 445–448
Occupant Classification System
(OCS) 88
Safety guidelines 76
Side impact 78
Window curtain 78
Air conditioning, Cooling 228, 243
Air conditioning refrigerant 540Air conditioning system see
Climate control or
Automatic climate control (3-zone)*
Air distribution 223, 238
Air pressure see Tire inflation pressure
Air pressure, Tires 401
Air pump, Electric 502
Air recirculation mode 226, 240
Air vents, Front 218, 224, 232, 238
Air vents, Rear 230, 245, 249
Air volume 224, 239
AIRMATIC* 285
Messages in the multifunction
display 470
Alarm system see Anti-theft systems
Alignment bolt (vehicle tool kit) 472, 500
Anticorrosion/antifreeze 543, 546
Antiglare, Interior rear view mirror 212
Antiglare, Auto-dimming rear view
mirrors* 213
Anti-theft systems 107
Anti-theft alarm system 107
Immobilizer 107Aquaplaning see Hydroplaning
Arm rests, Second-row 141
Armrest storage compartments
Front 313
Rear* 314
Ashtrays* 319
Aspect ratio 401
ATF 370
AUDIO menu 171
CD operation 172
Radio operation 171
Satellite radio* operation 172
Audio search function 188
Auto-dimming*, Rear view mirrors 213
Automatic antiglare for rear view
mirrors* 213
Automatic central locking, Control
system 189

548 Index
Automatic climate control (3-zone)* 232
Air conditioning, Cooling 243
Air conditioning refrigerant 540
Air distribution 238
Air recirculation mode 240
Air vents, Front 232, 238
Air vents, Rear 245, 249
Air volume 239
Control panel, Front 234
Control panel, Rear 245
Deactivating system 236
Defogging 240
Defrosting 239
Maximum cooling, MAX COOL 240
Rear passenger compartment 245
Residual heat utilization (REST) 244
Automatic headlamp mode 147
Automatic lighting control, Interior
lighting 154
Automatic locking when driving 130
Automatic shift program 206Automatic transmission 197
Accelerator position 203
Automatic shift program 206
Emergency operation
(limp-home mode) 211
Gear ranges 205
Gear selector lever 54, 197
Gear shifting malfunctions 211
Hill start assist system 204
Kickdown 203
Kickdown, manual shift program
(R 63 AMG only) 211
Manual shift program
(R 63 AMG only) 209
Program mode selector switch 206
Shifting procedure 200
Starting the engine 54
Steering wheel gearshift control 207
Transmission fluid level 370
Transmission positions 201
Automatic transmission fluid see ATF
AUX-socket 311B
Backrest
Seat 44
Seat, Lumbar support 136
Seat, Multicontour* 136
Backup lamps
Messages in the multifunction
display 463–468
Replacing bulbs 484
Bar 401
BAS 102
Lamps in instrument cluster 420
Messages in the multifunction
display 435
Batteries, SmartKey
Check lamp 112, 116
Checking battery condition 115, 120
Battery, Vehicle 506
Charging 513
Disconnecting and connecting 508
Jump starting 514
Removing and installing 508
Bead 401

549 Index
Beverage holder see Cup holder
Bleeding the fuel system
(diesel engine) 505
Bolts, Spare wheel 500
Bottle opener 317
Brake Assist System see BAS
Brake fluid 541
Checking 362
Messages in the multifunction
display 454
Brake lamp
Cleaning lenses 413
Messages in the multifunction
display 463–468
Replacing bulbs 484
Brake pads 348
Messages in the multifunction
display 452
Brakes 348
High-performance brake system
(AMG vehicles only) 350
Warning lamp 421
Break-in the vehicle 346
Bulbs, replacing see Replacing bulbsC
California retail buyers and lessees,
Important notice for 11
Call priority, Tele Aid* 336
Can holder see Cup holder
Capacities and recommended
fuel/lubricants 538
Card holder 32, 317
Cargo compartment
Tie-down rings 299
Cargo compartment cover blind* 306
Cargo tie-down rings 299
Carpets, Cleaning 417
Catalytic converter
(gasoline engine) 357
CD changer* 172, 311
CD player 172
Center console 31
Central locking 189
Automatic 130
Locking/unlocking from the
inside 130
Central locking switch 130Certification label 526, 527
CHECK ENGINE malfunction
indicator lamp 423, 424
Checking tire pressure electronically
Advanced Tire Pressure Monitoring
System (Advanced TPMS)*,
(Canada only) 388
Tire Pressure Monitoring System
(TPMS), (USA only) 385
Child safety
Infant and child restraint systems 85
Children in the vehicle 84
Air bags 75, 86
Blocking rear door window
operation 97
Indicator lamp, Front passenger front
air bag 92
Infant and child restraint
systems 93, 95
LATCH-type child seat anchors 93
Occupant Classification System
(OCS) 88
Cigarette lighter* 321