2008 MERCEDES-BENZ R320 service

541 Technical data
Fuels, coolants, lubricants, etc.
In 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 (USA
only) or contact an authorized
Mercedes-Benz Light Truck Center 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.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
corrosion protection.If the antifreeze mixture is effective to
-35°F (-37°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.
!Damage or malfunction resulting from poor
fuel quality or from blending additional fuel
additives other than those tested and approved
by us for use on Mercedes-Benz vehicles are not
covered by the Mercedes-Benz Limited
Warranty.
! Add premixed coolant solution only. Adding
water and MB 325.0 Anticorrosion/Antifreeze
separately from each other, could cause engine
damage not covered by the Mercedes-Benz
Limited Warranty.

542 Technical data
Fuels, coolants, lubricants, etc.
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 are used to
renew the coolant concentration or bring it
back up to the proper level.
For information on other Mercedes-Benz
approved products of equal specification,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Light Truck
Center.To provide important corrosion protection,
the solution must be at least
50% anticorrosion/antifreeze (equivalent
to freeze protection to approximately
-35°F [-37°C]). If you use a solution that is
more than 55% anticorrosion/antifreeze
(freeze protection to approximately
-49°F [-45°C]), the engine temperature
will increase due to the lower heat transfer
capability of the solution.
Therefore, do not use more than this
amount of anticorrosion/antifreeze.
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,
consult an authorized Mercedes-Benz
Light Truck Center.

543 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
necessitates 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:
MB 325.0 Anticorrosion/Antifreeze 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
Approximate freeze protection
Model-35°F (-37°C)-49°F (-45°C)
R 320 CDI 4MATIC5.0 US qt (4.75 l)5.5 US qt (5.2 l)
R 3501
1USA only.
5.0 US qt (4.75 l)5.5 US qt (5.2 l)
R 350 4MATIC5.0 US qt (4.75 l)5.5 US qt (5.2 l)
R 550 4MATIC2
2Canada only.
5.6 US qt (5.25 l)6.1 US qt (5.8 l)

549 Index
D
Date display, Setting 176
Daytime running lamp mode 145
Setting 177
Deep water see Standing water
Defogging windshield 216, 230
Defrosting, Front 214, 229
Defrosting, Rear 207
Delayed shut-off
Exterior lamps 179
Interior lighting 180
Department of Transportation see DOT
Diesel engine
Bleeding fuel system 502
Preglow indicator lamp 29
Diesel fuel see Fuel
Difficulties
While driving 62
With starting 55
Digital speedometer 157, 165
Dimensions, Vehicle 534
Direction of rotation (tires) 365Displays
Digital speedometer 157, 165
Distronic* (Canada only) 168, 265
Maintenance service indicator
message 400
Messages in the multifunction
display 427–466
Multifunction display 157
Outside temperature 155, 157, 165
Selecting 175
Showing malfunctions 169
Symbol messages 444
Text messages 429
Vehicle status message memory 169
Vehicle system settings, Control
system 161, 163, 170
Distance to empty (range), Trip
computer 185
Distance warning function* (Canada
only) 185Distronic* (Canada only) 262
Activating 268
Cleaning system sensor 407
Control system 267
Deactivating 271
Distance warning function* 275
Driving hints 273
Messages in the multifunction
display 431
Warning and indicator lamps 265
Door
Entry lamps 153
Locking, In an emergency 475
Locking/unlocking,
KEYLESS-GO* 113
Locking/unlocking, SmartKey 110
Messages in the multifunction
display 452
Opening from the inside 118
Opening from the outside 112
Remote door unlock (Tele Aid*) 328
Unlocking, Mechanical key 474
Door control panel 36
Door handle 36
Door windows see Power windows
DOT 388, 394

556 Index
Lighting
Parking lamps 143
Lighting, Exterior and interior 143
Limp-home mode 202, 417, 418
Loading see Vehicle loading
Loading terminology 393
Locator lighting 146, 178
Lock buttons, KEYLESS-GO*
Outside door handle 68
Loss of keys, Mechanical key 118
Loss of keys, SmartKey 118
Loss of keys, SmartKey with
KEYLESS-GO* 118
Loss of Service and Warranty Information
Booklet 523
Low beam headlamps
Messages in the multifunction
display 455–460
Replacing bulbs 483
switching on 58, 143
Lubricants 536M
Maintenance 12, 400
Calling up service indicator
display 402
Clearing service indicator
message 401
Maintenance System 400
Resetting service indicator 402
Service indicator message 400
Service term exceeded 401
Manual headlamp mode see Headlamps
Maximum cooling, MAXCOOL see Auto-
matic climate control (3-zone)*
Maximum inflation pressure, Tires 395
Maximum load rating, Tires 395
Maximum loaded vehicle weight,
Tires 395
Mechanical key 474
Memory function* 141Menus see Control system menus
Messages in display see Multifunction dis-
play messages
Microphone, Hands-free 33
Mirrors
Adjusting 48
Auto-dimming* 203
Exterior rear view mirrors 48
Interior rear view mirror 48, 203
Mobile phone see Telephone*
MON 540
Multicontour seats* 132
Multifunction display 157
Changing settings see Control system
menus and Control system
submenus
Selecting language 174
Standard display 161

558 Index
Odometer 155, 157
Oil level see Engine oil, Checking level
Oil see Engine oil
One-touch gearshifting 201
Operating safety 16
Operator’s Manual 10
Ornamental moldings, Cleaning 407
Outside temperature see Displays
Overdue maintenance service term 401
Overhead control panel 33
Oxidation catalyst (diesel engine) 349
P
Paintwork code 524
Paintwork, Cleaning 404
Panic alarm 98
Panorama roof with power tilt/sliding
panel* 252
Cleaning 410
Convenience closing feature 245
Opening/closing 253
Roller sunblinds 252
Stopping 253
Summer opening feature 244
Synchronizing 255Parcel nets 307
Parking 64, 343
Parking brake 56, 65
Lamps, Indicator and warning 415
Messages in the multifunction
display 446
Releasing 56
Parking lamps 481
Messages in the multifunction
display 458
Replacing bulbs 480
Parktronic* (Parking assist) 281
Cleaning system sensors 408
Minimum distance 283
Range 282
Sensor cover 408
Switching on/off 284
System malfunction 285
System sensors 282
Warning indicators 283
Parts service 522
PASS AIR BAG OFF indicator lamp see
Front passenger front air bag off
indicator lampPassenger compartment 347
Fuse box 520
Interior lighting 150
Passenger safety see Occupant safety
Pedals 339
Permanent four-wheel drive 281
Phone see Telephone*
Plastic and rubber parts, Cleaning 410
Poly-V-belt drive
Layout 526
Positions (Memory function*) see
Seats 142
Power assistance 340
Power outlets 314
Power seats see Seats
Power tilt/sliding sunroof* 248
Convenience closing feature 245
Opening/closing 248
Stopping 245
Summer opening feature 244
Synchronizing 250
Power washer 404

559 Index
Power windows
Cleaning 409
Convenience closing feature 245
Door windows 241
Hinged quarter windows* 243
Opening/closing 241
Rear door windows, Blocking
operation 97
Summer opening feature 244
Synchronizing, Door windows 244
Practical hints 413
Premium unleaded gasoline 539
Problems
While driving 62
With starting see Starting difficulties
With the vehicle 17
Product information 9
Production options weight 395
Program mode see Automatic transmis-
sion, Automatic shift program
Program mode selector switch
Automatic shift program 200
PSI 395
Push-starting see Tow-startingQ
Quarter windows see Power windows
R
Radio
AUDIO menu, Control system 166
Selecting station 166
Selecting station (satellite*) 166
Radio transmitters 348
Range (distance to empty) 187
Reading lamp 151, 152
Rear automatic climate control* 236
Rear center console* 315
Rear climate control* 220
Rear door window sunshade* 207
Rear door windows
Blocking operation 97
Rear lamps see Tail lamps
Rear seat ashtray see Ashtrays 311
Rear seat head restraints see Head
restraints 135
Rear towing eye 516Rear view camera* 285
Cleaning 408
Lens, Cleaning 408
Rear view mirrors see Mirrors
Rear view mirrors, Automatic
antiglare* 203
Rear window defroster 207
Rear window wiper/washer 61
Rear windows see Power windows
Recommended tire inflation
pressure 395
Recovery services, Stolen vehicle (Tele
Aid*) 329
Refrigerant, Air conditioning 538
Refueling 352
Regular checks 354
Reminder, Seat belt see Seat belts, Telltale
Remote control
SmartKey 110
SmartKey with KEYLESS-GO* 113
Remote door unlock, Tele Aid* 328

561 Index
Seats 128
Adjusting 43
Easy entry/exit feature 128
Heating* 139
Memory function* 141
Multicontour seat* 132
Ventilation* 140
Securing cargo 290
Selector lever see Gear selector lever
Self-test
Lamps in the instrument cluster 414
OCS 82
Tele Aid* 323
Service and warranty information 10
Service intervals see Maintenance, Service
indicator message 402
Service life
Tires 364
Vehicle battery 503
Service, Parts 522
Service see Maintenance
Service system see Maintenance SystemSettings
AIRMATIC* 276
Clock 176
Comfort functions* 183
Control system menus 160, 162
Control system
submenus 161, 163, 171
Date 176
Distance warning function* 185
Factory, SmartKey 112
Factory, SmartKey with
KEYLESS-GO* 116
Individual, Vehicle 170
Instrument cluster 174
Language, multifunction display 175
Lighting 177
Memory function* 141
Resetting all, Control system 171
Selective, SmartKey 112
Selective, SmartKey with
KEYLESS-GO* 117
Time 176
Vehicle level control* 277Shift program mode, Automatic
transmission 200
Shifting, Automatic transmission 190
Side impact air bags 76
Side marker lamps
Cleaning lenses 407
Messages in the multifunction
display 458
Replacing bulbs 480, 481
Side windows see Power windows
Sidewall 395
SmartKey see Key, SmartKey 110
SmartKey with KEYLESS-GO* see Key,
SmartKey with KEYLESS-GO* 113
Snow chains 399
Snow tires see Winter tires
Spare fuses 467
Spare wheel 471, 532
Inflating 499
Mounting 493
Wheel bolts 467, 498
Speed settings
Cruise control 261
Distronic* (Canada only) 268
Speedometer 27
Spinning see Tires, Direction of rotation