2007 MERCEDES-BENZ R320CDI cooling

457 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
B Top up coolant
See Oper. ManualThe coolant level is too low.Add coolant (page 370).
If you have to add coolant frequently,
have the cooling system checked by an
authorized Mercedes-Benz Light Truck
Center.
Warning!G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You could be seriously burned.
!Do not ignore the low engine coolant level
warning. Extended driving with the message and
symbol displayed may cause serious engine
damage not covered by the Mercedes-Benz
Limited Warranty.
Do not drive without sufficient amount of coolant
in the cooling system. The engine will overheat,
causing major engine damage.

471 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
n*Vehicle rising
wait brieflyThe vehicle level is too low.Do not drive off.
The vehicle level control* has not yet
adjusted the vehicle level to the nec-
essary height required for driving.
Wait until the message disappears
from the multifunction display.
You may then drive off.
Compressor
cooling downLevel control was activated too long/too
frequently.Let the compressor cool until the
message disappears.
The selected level will be set once the
compressor has cooled down.
Level selection
not permittedYou are driving too fast for the desired
level selection.Reduce vehicle speed.
Set the next higher level
(
page 287).
!When the message Compressor cooling
down
appears in the multifunction display, driv-
ing is still possible.Keep in mind that the ride height of the vehicle is
not yet reached and you could therefore damage
the underbody of the vehicle.
The selected level will be set once the compres-
sor has cooled down.

539 Technical data
Fuels, coolants, lubricants, etc.
ModelCapacityFuels, coolants, lubricants, etc.
Power steeringapprox. 1.3 US qt (1.2 l)MB Power Steering Fluid
Front wheel hubsapprox. 1.5 oz (43 g) eachHigh temperature roller bearing grease
Brake systemMB Brake Fluid (DOT 4+)
Cooling systemR320CDI
R350
R500
R63AMG10.0 US qt (9.5 l)
10.0 US qt (9.5 l)
11.1 US qt (10.5 l)
12.2 US qt (11.5 l)MB Anticorrosion/Antifreeze
Fuel Tank
including a reserve of
All, except R 63 AMG
R63AMG
21.1 US gal (80.0 l)
approx. 3.4 US gal (13.0 l)
approx. 4.0 US gal (15.0 l)Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg.of96RON/86MON)
Air conditioning systemR-134a refrigerant and special PAG lubricant
oil (never R-12)
Windshield washer and
headlamp cleaning*
system8.0 US qt (7.6 l)MB Windshield Washer Concentrate1
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing or MB Windshield Washer Concentrate “S” and commercially available
premixed windshield washer solvent/antifreeze for temperatures below freezing. Follow suggested mixing ratios (page 546).

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.

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

550 Index
Climate control 218
Air conditioning, Cooling 228
Air conditioning refrigerant 540
Air distribution 223
Air recirculation mode 226
Air vents, Front 218, 224
Air vents, Rear 230
Air volume 224
Control panel, Front 220
Control panel, Rear 230
Deactivating system 222
Defogging 225
Defrosting 224
Rear passenger compartment 229
Residual heat utilization (REST) 229
Clock 26, 181
Cockpit 24
Cold tire inflation pressure 401
Collapsible tire 475, 534
Collapsible wheel chock 475
Combination switch 59, 60, 62, 150
Compass 342
Control system 186
Control and operation of radio
transmitters 357Control system 159
Multifunction display 159
Multifunction steering wheel 160
Resetting to factory default 176
Control system menus 162
AIRMATIC*/Compass 174
AMG Menu 168
AUDIO 171
Distance warning function* 191
Distronic* 174
Navi* 173
Settings 176
Standard display 166
TEL* 193
Trip computer 191
Vehicle status message memory 174
Control system submenus 163, 165
Comfort* 189
Instrument cluster 179
Lighting 183
Time/Date 181
Vehicle 186Coolant 370, 539, 543
Anticorrosion/antifreeze mixing ratio
and quantity 543
Capacities 539
Checking coolant level 370
Messages in the multifunction
display 455–457
Temperature 359
Corner-illuminating front fog lamps* 151
Fog lamps, Front 149
Messages in the multifunction
display 464
Replacing bulbs 484, 485
Cruise control 266
Activating 267
Messages in the multifunction
display 436
Cup holders 316
Front center console 316
Rear center console 318
Curb weight 401