2008 MERCEDES-BENZ R320 light

512 Practical hints
Jump starting
The jump-start contacts are located in the
engine compartment.
1Negative (-) terminal
2Positive (+) terminal
3Positive terminal cover
Make sure the two vehicles do not
touch.
Turn off all electrical consumers.
Apply the parking brake (page 65).
Set automatic transmission to
positionP (
page 192).
Open the hood (page 356).
Remove cover from negative
terminal1.
Flip up cover 3 of positive terminal 2
in direction of arrow.
1Negative terminal of discharged
battery
2Positive terminal of discharged battery
4Positive terminal of charged battery
5Negative terminal of charged battery
Connect positive terminals2 and 4
with the jumper cable. Clamp cable to
charged battery 4 first.
Start engine of the vehicle with the
charged battery and run at idle speed.
Connect negative terminals1 and 5
of the batteries with the jumper cable.
Clamp cable to charged battery 5
first.
Start the engine of the disabled vehi-
cle.
You can now turn on the electrical con-
sumers. Do not switch on the headlamps
under any circumstances.
Remove the jumper cables first from
negative terminals1 and 5 and then
from positive terminals2 and 4.
You can now switch on the headlamps.
Have the battery checked at the
nearest authorized Mercedes-Benz
Light Truck Center.
Warning!G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety instructions and precau-
tions when handling automotive batteries.
!Never invert the terminal connections!

518 Practical hints
Fuses
The electrical fuses in your vehicle serve to
switch off malfunctioning power circuits.
If a fuse is blown, the components and
systems secured by that fuse will stop
operating.If a newly inserted fuse blows again, have
the cause determined and rectified by an
authorized Mercedes-Benz Light Truck
Center.
A fuse chart explains the fuse allocation
and fuse amperages. It is located in the
cargo compartment with the vehicle tool
kit (
page 469).
The electrical fuses are located in different
fuse boxes:

on the passenger side of the engine
compartment (
page 519)

in the cargo compartment
(
page 519)

in the passenger compartment
(
page 520)Before replacing fuses:
Apply the parking brake (page 65).
Make sure automatic transmission is
set to position P (
page 192).
The gear position indicator in the
multifunction display should be on
P.
Turn off all electrical consumers.
Turn off the engine (page 66).
Remove the SmartKey from the starter
switch.
Vehicles with KEYLESS-GO*:
Open the driver’s door (this puts
the starter switch to position0,
same as with the SmartKey re-
moved from starter switch). The
driver’s door can then be closed
again.
Warning!G
Only use fuses approved by Mercedes-Benz
with the specified amperage for the system
in question and do not attempt to repair or
bridge a blown fuse. Using other than
approved fuses or using repaired or bridged
fuses may cause an overload leading to a
fire, and/or cause damage to electrical
components and/or systems. Have the
cause determined and remedied by an
authorized Mercedes-Benz Light Truck
Center
iA blown fuse must be replaced by an appro-
priate spare fuse (recognizable by its color or the
fuse rating given on the fuse) of the amperage
recommended in the fuse chart.
Any Mercedes-Benz Light Truck Center will be
glad to advise you on this subject.

522 Technical data
The “Technical data” section provides the
necessary technical data for your vehicle.
Parts service
All authorized Mercedes-Benz Light Truck
Centers maintain a stock of Genuine
Mercedes-Benz Parts required for mainte-
nance and repair work. In addition, strate-
gically located parts distribution centers
provide quick and reliable parts service.
More than 300 000 different parts for
Mercedes-Benz models are available.
Genuine Mercedes-Benz Parts are sub-
jected to stringent quality inspections.
Each part has been specifically developed,
manufactured or selected for and adapted
to Mercedes-Benz vehicles.
Therefore, Genuine Mercedes-Benz Parts
should be installed.!The use of non-genuine Mercedes-Benz
parts and accessories not authorized by
Mercedes-Benz could damage the vehicle, which
is not covered by the Mercedes-Benz Limited
Warranty, or could compromise the vehicle’s
durability or safety.

523 Technical data
Warranty coverage
Warranty coverage
Your vehicle is covered under the terms of
the warranties printed in the Service and
Warranty Information booklet. Your
authorized Mercedes-Benz Light Truck
Center will exchange or repair any defec-
tive parts originally installed on the vehicle
in accordance with the terms of the follow-
ing warranties:

New Vehicle Limited Warranty

Emission System Warranty

Emission Performance Warranty

California, Maine, Massachusetts, and
Vermont Emission Control Systems
WarrantyReplacement parts and accessories are
covered by the Mercedes-Benz Parts and
Accessories warranties, copies of which
are available at any Mercedes-Benz Light
Truck Center.Loss of Service and Warranty
Information Booklet
Should you lose your Service and Warranty
Information booklet, have an authorized
Mercedes-Benz Light Truck Center arrange
for a replacement. It will be mailed to you.

527 Technical data
Engine
Engine
ModelR 320 CDI 4MATIC (251.122)1R 350 (251.156)1,2
R 350 4MATIC (251.165)1
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Light Truck Center for the corresponding data of all special bodies and special
equipment.
2USA only.
Engine642272
Mode of operationDiesel 4-stroke engine4-stroke engine, gasoline injection
No. of cylinders66
Bore3.27 in (83.00 mm)3.66 in (92.90 mm)
Stroke3.62 in (92.00 mm)3.39 in (86.00 mm)
Total piston displacement182 cu in (2 987 cm3)213 cu in (3 498 cm3)
Compression ratio17.7:110.7:1
Output acc. to SAE J 1349215 hp/4 000 rpm
(160 kW/4 000 rpm)268 hp/6 000 rpm3
(200 kW/6 000 rpm)
3Premium fuel required. Performance may vary with fuel octane rating.
Maximum torque acc. to SAE J 1349400 lb-ft/1 600 - 2 400 rpm
(543 Nm/1 600 - 2 400 rpm)258 lb-ft/2 400 - 5 000 rpm
(350 Nm/2 400 - 5 000 rpm)
Maximum engine speed4 500 rpm6500 rpm
Firing order1-4-2-5-3-61-4-3-6-2-5
Poly-V-belt2 035 mm2404 mm

528 Technical data
Engine
ModelR 550 4MATIC (251.172)1,2
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Light Truck Center for
the corresponding data of all special bodies and special equipment.
2Canada only.
Engine273
Mode of operation4-stroke engine, gasoline injection
No. of cylinders8
Bore3.86 in (98.00 mm)
Stroke3.56 in (90.50 mm)
Total piston displacement333cuin (5461cm3)
Compression ratio10.7:1
Output acc. to SAE J 1349382 hp/6 000 rpm3
(285 kW/6 000 rpm)
3Premium fuel required. Performance may vary with fuel octane rating.
Maximum torque acc. to SAE J 1349391 lb-ft/2 800 - 4 800 rpm
(530 Nm/2 800 - 4 800 rpm)
Maximum engine speed6 500 rpm
Firing order1-5-4-2-6-3-7-8
Poly-V-belt2 404 mm

529 Technical data
Rims and tires
Rims and tires
!Only use tires which have been tested and
approved by Mercedes-Benz. Tires approved by
Mercedes-Benz are developed to provide best
possible performance in conjunction with the
driving safety systems on your vehicle such as
ABS or ESP
®. Tires specially developed for your
vehicle and tested and approved by
Mercedes-Benz can be identified by finding the
following on the tire’s sidewall:

MO = Mercedes-Benz Original equipment
tires
Using tires other than those approved by
Mercedes-Benz may result in damage that is
not covered by the Mercedes-Benz Limited
Warranty.
!Using tires other than those approved by
Mercedes-Benz can have detrimental effects,
such as

poor handling characteristics

increased noise

increased fuel consumption
Moreover, tires and rims not approved by
Mercedes-Benz may, under load, exhibit dimen-
sional variations and different tire deformation
characteristics that could cause them to come
into contact with the vehicle body or axle parts.
Damage to the tires or the vehicle may be the
result.
iFurther information on tires and rims is
available at any authorized Mercedes-Benz Light
Truck Center. A placard with the recommended
tire inflation pressures is located on the driver’s
door B-pillar (
page 366). Some vehicles may
have supplemental tire inflation pressure infor-
mation for driving at high speeds (
page 372)
or for vehicle loads less than the maximum
loaded vehicle condition (
page 372). If such
information is provided, it can be found on the
placard located on the inside of the fuel filler
flap.The tire inflation pressure should be checked
regularly and should only be adjusted on cold
tires. Follow tire manufacturer’s maintenance
recommendation included with vehicle.
iThe following pages also list the approved
wheel rim and tire sizes for equipping your vehi-
cles with winter tires. Winter tires are not avail-
able as standard or optional factory equipment,
but can be purchased from an authorized
Mercedes-Benz Light Truck Center.
Depending on vehicle model and the standard or
optional factory-equipped wheel rim/tire
configuration on your vehicle (Appearance
Package, Sport Package etc.), equipping your
vehicle with winter tires approved for your
vehicle model may also require the purchase of
two or four wheel rims of the recommended size
for use with these winter tires. Contact an
authorized Mercedes-Benz Light Truck Center
for more information.

530 Technical data
Rims and tires
Same size tires
ModelR 320 CDI 4MATIC
R 3501
R 350 4MATIC
R 320 CDI 4MATIC (Sport Package*)
R 350 (Sport Package*)1
R 350 4MATIC (Sport Package*)
R 550 4MATIC2
R 550 4MATIC (Sport Package*)2
Rims (light alloy)8 J x 18 H28Jx19H2
Wheel offset2.64 in (67 mm)2.64 in (67 mm)
All-season tires3255/55 R18 105H M+S255/50 R19 107H XL (Extra Load) M+S
Winter tires3,4255/55 R18 105H M+S.255/50 R19 107H XL (Extra Load) M+S.
1USA only.2Canada only.3Radial-ply tires4Not available as factory equipment.