366 Operation
Engine compartment
Closing
Let the hood drop from a height of
approximately 1 ft (30 cm).
The hood will lock audibly.
Check to make sure the hood is fully
closed.
If you can raise the hood at a point
above the headlamps, then it is not
properly closed. Open it again and let it
drop with somewhat greater force.
Engine oil
The amount of oil your engine needs will
depend on a number of factors, including
driving style. Increased oil consumption
can occur when
the vehicle is new
the vehicle is driven frequently at
higher engine speeds
Engine oil consumption checks should only
be made after the vehicle break-in period.Checking engine oil level with the
control system (R 500 only)
When checking the oil level
the vehicle must be parked on level
ground
with the engine at operating tempera-
ture, the vehicle must have been
stationary for at least 5 minutes with
the engine turned off
with the engine not at operating tem-
perature yet, the vehicle must have
been stationary for at least 30 minutes
with the engine turned off
To check the engine oil level via the
multifunction display, do the following:
Switch on the ignition (page 39).
The standard display (
page 166)
should appear in the multifunction
display.
Warning!G
When closing the hood, use extreme caution
not to catch hand or fingers. Be careful that
you do not close the hood on anyone.
Make sure the hood is securely engaged be-
fore driving. Do not continue driving if the
hood can no longer engage after an accident
for example. The hood could otherwise
come loose while the vehicle is in motion
and injure you and/or others.
iDo not use any special lubricant additives,
as these may damage the drive assemblies.
Using special additives not approved by
Mercedes-Benz may cause damage not covered
by the Mercedes-Benz Limited Warranty.
More information on this subject is available at
any Mercedes-Benz Light Truck Center.
392 Operation
Tires and wheels
Tire size designation, load and speed
rating
1Tire width
2Aspect ratio in %
3Radial tire code
4Rim diameter
5Tire load rating
6Tire speed ratingGeneral:
Depending on the design standards used,
the tire size molded into the sidewall may
have no letter or a letter preceding the tire
size designation.
No letter preceding the size designation
(as illustrated above): Passenger car tire
based on European design standards.
Letter “P” preceding the size designation:
Passenger car tire based on U.S. design
standards.
Letter “LT” preceding the size designation:
Light Truck tire based on U.S. design
standards.
Letter “T” preceding the size designation:
Temporary spare tires which are high
pressure compact spares designed for
temporary emergency use only. Tire width
The tire width1 (
page 392) indicates
the nominal tire width in mm.
Aspect ratio
The aspect ratio2 (
page 392) is the
dimensional relationship between tire
section height and section width and is
expressed in percentage. The aspect ratio
is arrived at by dividing section height by
section width.
Tire code
The tire code3 (
page 392) indicates
the tire construction type. The “R” stands
for radial tire type. Letter “D” means diag-
onal or bias ply construction; letter “B”
means belted-bias ply construction.
At the tire manufacturer’s option, any tire
with a speed capability above 149 mph
(240 km/h) can include a “ZR” in the size
designation (for example: 245/40 ZR 18).
For additional information, see “Tire speed
rating” (
page 393).
iFor illustration purposes only. Actual data
on tires are specific to each vehicle and may vary
from data shown in above illustration.
401 Operation
Tires and wheels
Tire and loading terminology
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
automatic transmission, power steering,
power brakes, power windows, power
seats, radio, and heater, to the extent that
these items are available as
factory-installed equipment (whether
installed or not).
Air pressure
The amount of air inside the tire pressing
outward on each square inch of the tire.
Air pressure is expressed in pounds per
square inch (psi), or kilopascal (kPa) or
bars.
Aspect ratio
Dimensional relationship between tire
section height and section width
expressed in percentage.Bar
Another metric unit for air pressure. There
are 14.5038 pounds per square inch (psi)
to 1 bar; there are 100 kilopascals (kPa)
to 1 bar.
Bead
The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the
rim.
Cold tire inflation pressure
Tire inflation pressure when your vehicle
has been sitting for at least 3 hours or
driven no more than 1 mile (1.6 km).
Curb weight
The weight of a motor vehicle with stan-
dard equipment including the maximum
capacity of fuel, oil, and coolant, and, if so
equipped, air conditioning and additional
optional equipment, but without passen-
gers and cargo.DOT (Department of Transportation)
A tire branding symbol which denotes the
tire meets requirements of the
U.S. Department of Transportation.
GAWR (G
ross Axle Weight Rating)
The GAWR is the maximum permissible
axle weight. The gross vehicle weight on
each axle must never exceed the GAWR for
the front and rear axle indicated on the
certification label located on the driver’s
door B-pillar.
GTW (G
ross Trailer Weight)
The GTW is the weight of the trailer plus
the weight of all cargo, equipment, luggage
etc. loaded on the trailer.
447 Practical hints
What to do if …
Display messagePossible
cause/consequencePossible solution
Front passenger airbag
disabled
See Operator’s ManualFront passenger front
air bag is deactivated
while driving even
though an adult or
someone larger than a
small individual is oc-
cupying the front pas-
senger seat. Forces
acting on the seat may
make the system
sense a decrease in
weight.Stop the vehicle in a safe location as soon as possible and check the front
passenger seat for the following:
Apply the parking brake (page 66).
Switch off the ignition (page 39).
Have the front passenger vacate the seat and exit the vehicle.
Adjust the seat in a height position (page 44).
Make sure that no objects which apply forces to the seat are present (e.g. ob-
jects such as books, briefcases etc. lodged underneath, behind or around the
seat). Such forces may cause the system to sense that an occupant of a lesser
weight than actually present is on the front passenger seat.
Keep the seat unoccupied, close the front passenger door and switch on the
ignition (
page 39).
(Continued on next page)
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.
536 Technical data
Main Dimensions
ModelR320CDI, R350R500R63AMG
Overall vehicle length203.0 in (5 157 mm)203.0 in (5 157 mm)203.0 in (5 157 mm)
Overall vehicle width (exterior mirrors folded out)85.4 in (2 168 mm)85.4 in (2 168 mm)85.4 in (2 168 mm)
Overall vehicle width (exterior mirrors folded in)75.7 in (1 922 mm)75.7 in (1 922 mm)77.5 in (1 922 mm)
Overall vehicle height1
1Data apply to unladen vehicles with standard equipment. Data may vary in vehicles equipped with AIRMATIC* depending on the selected
damping settings (page 285) and the current vehicle level (page 286).
65.4 in (1 661 mm)65.4 in (1 663 mm)64.3 in (1 634 mm)
Wheelbase126.6 in (3 215 mm)126.6 in (3 215 mm)126.6 in (3 215 mm)
Track, front65.6 in (1 665 mm)64.7 in (1 643 mm)65.6 in (1 665 mm)
Track, rear65.3 in (1 658 mm)64.4 in (1 636 mm)65.0 in (1 652 mm)
Ground clearance15.8 in (148 mm)5.9 in (150 mm)5.9 in (150 mm)
Turning circle40.7 ft (12.4 m)40.7 ft (12.4 m)40.7 ft (12.4 m)
562 Index
Refrigerant, Air conditioning 540
Refueling 360
Regular checks 362
Reminder, Seat belt see Seat belts, Telltale
Remote control
SmartKey 112
SmartKey with KEYLESS-GO* 116
Remote door unlock, Tele Aid* 336
Replacing bulbs 484
Backup lamps 484, 485, 491
Brake lamps 484, 485, 491
Corner-illuminating front fog
lamps* 484, 485, 487, 489
Fog lamp, Rear 484, 485, 491, 492
Headlamps 484, 485, 487
License plate lamps 484, 485, 491,
493
Low beam headlamps 484, 485, 487
Parking lamps 484, 485, 487, 489,
491, 492
Side marker lamps, Front 484, 491
Side marker lamps, Rear 484, 485,
491, 492
Standing lamps 484, 485, 487, 489,
491, 492Tail lamps 484, 485, 491
Turn signal lamps 484, 485, 487,
489, 491
Reporting safety defects 18
Reset button, In instrument cluster 156
Reset tool
Active head restraints,
Depository 482
Residual heat utilization 245
Restraint system
See Children in the vehicle
See SRS
Restraint system see Infant and child re-
straint systems
Reverse gear position, Automatic
transmission 197, 201
Rims 403, 532
Roadside Assistance 12
Roadside Assistance button see Tele Aid*
Roller sunblinds, Panorama roof* 261
RON 542
Roof rack* 297
Rubber parts, Cleaning 416
Run Flat Indicator (Canada only) 383S
Safety
Driving safety systems 100
Occupant safety 72
Reporting safety defects 18
Safety belts see Seat belts
Satellite radio* 172
Seat belt force limiter 82
Seat belt height adjustment 53
Seat belts 79
Children in the vehicle 84
Cleaning 417
Fastening 51
Height adjustment 53
Proper use of 53, 81
Safety guidelines 76
Telltale 29, 79, 426
Seat heating* see Seats 143
Seat ventilation* see Seats
Seating capacity 377