torque MERCEDES-BENZ R350 2006 W251 Owner's Manual

389 Operation
Tires and wheels
In some cases, such as when your vehicle
is equipped with mixed-size tires (different
tire dimension front vs. rear), tire rotation
is not possible.
If applicable to your vehicle's tire configu-
ration, tires can be rotated according to
the tire manufacturer’s recommended in-
tervals in the tire manufacturer’s warranty
pamphlet located in your vehicle literature
portfolio. If none is available, tires should
be rotated every 3 000 to 6 000 miles
(5 000 to 10 000 km), or sooner if neces-
sary, according to the degree of tire wear.
The same rotation (spinning) direction
must be maintained (
page 356).
Rotate tires before the characteristic tire
wear pattern becomes visible (shoulder
wear on front tires and tread center wear
on rear tires).
Thoroughly clean the mounting face of
wheels and brake disks, i.e. the inner side
of the wheels/tires, during each rotation.
Check for and ensure proper tire inflation
pressure.For information on wheel change, see “Flat
tire” (
page 478).
Warning!
G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
110 lb-ft (150 Nm).
Only use genuine Mercedes-Benz wheel
bolts specified for your vehicle’s rims.

485 Practical hints
Flat tire

Detach the electric air pump.

Store the electrical plug and the air
hose behind the flap and place the
electric air pump back in the vehicle
tool kit storage well.Lowering the vehicle

Lower vehicle by turning crank coun-
terclockwise until vehicle is resting ful-
ly on its own weight.

Remove the jack.
1-5Wheel bolts6Wheel wrench

Tighten the five wheel bolts evenly, fol-
lowing the diagonal sequence illustrat-
ed (1 to 5), until all bolts are tight.
Observe a tightening torque of
110 lb-ft (150 Nm).
Warning!
G
Follow recommend tire inflation pressures.
Do not overinflate tires. Overinflating tires
can result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes,
etc.
Do not underinflate tires. Underinflated tires
wear unevenly, adversely affect handling
and fuel economy, and are more likely to fail
from being overheated.
Warning!
G
Inflate collapsible tire only after the wheel is
properly mounted.
Inflate the collapsible tire using the electric
air pump (
page 483) before
lowering the
vehicle.
Warning!
G
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
110 lb-ft (150 Nm).


513 Technical data
Engine
Engine
Model
R 350 (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.
R 500 (251.175)
1
Engine
272
113
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
6
8
Bore
3.66 in (92.90 mm)
3.82 in (97.00 mm)
Stroke
3.39 in (86.00 mm)
3.31 in (84.00 mm)
Total piston displacement
213 cu in (3 498 cm
3)
303cuin (4966cm
3)
Compression ratio
10.7:1
10:1
Output acc. to SAE J 1349
268 hp / 6 000 rpm
2
(200 kW /6 000 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
302 hp / 5 600 rpm
2
(225 kW / 5 600 rpm)
Maximum torque acc. to SAE J 1349
258 lb-ft / 2 400 - 5 000 rpm
(350 Nm / 2 400 - 5 000 rpm)
339 lb-ft / 2 700 - 4 750 rpm
(460 Nm / 2 700 - 4 750 rpm)
Maximum engine speed
6500 rpm
6 300 rpm
Firing order
1-4-3-6-2-5
1-5-4-2-6-3-7-8
Poly-V-belt
2 404 mm
2 370 mm

518 Technical dataElectrical systemModel
R 350
R 500
Generator (alternator)
14 V / 150 A
14 V / 180 A
Starter motor
12 V / 1.4 kW
12 V / 1.7 kW
Battery
12 V/70 Ah
2 V/95 Ah
Spark plugs
NGK PLKR 6A
NGK PFR 5R-11
Electrode gap
0.031 in (0.8 mm)
0.031 in (0.8 mm)
Tightening torque
15 - 22 lb-ft (20 - 30 Nm)
15 - 22 lb-ft (20 - 30 Nm)

532 Technical termsMemory function*
Used to store three individual seat,
steering wheel and mirror positions.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline
as determined by a standardized meth-
od. It is an indication of a gasoline's
ability to resist undesired detonation
(knocking). The average of both the
MON (Motor Octane Number) and
->RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Multifunction display
The display field in the instrument clus-
ter used to present information provid-
ed by the control system.
Multifunction steering wheel
Steering wheel with buttons for operat-
ing the control system.Normal occupant weight
(
page 387)
Overspeed range
Engine speeds within the red marking
on the tachometer dial. Avoid this en-
gine speed range, as it may result in se-
rious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
Occupant distribution
(page 387)
Parktronic (Parking assist)*
System which uses visual and acoustic
signals to assist the driver during park-
ing maneuvers.
Poly-V-belt drive
Drives engine-components (alternator,
AC compressor, etc.) from the engine.Power train
Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles, includ-
ing


engine


clutch / torque converter


transmission


transfer case


drive shaft


differential


axle shafts / axles
PRE-SAFE
®*
(Pre
ventive Occupant Safe
ty System)
Vehicles equipped with PRE-SAFE
®*
take preventive measures when the
system senses certain driving dynam-
ics suggesting a possible accident.
Production options weight
(
page 387)

533 Technical terms
Program mode selector switch
Used to switch the automatic transmis-
sion between standard operation (S)
and comfort operation (C).
PSI
(P
ounds p
er s
quare i
nch)
(
page 387)
Recommended tire inflation pressure
(page 387)
REST
(Residual E
ngine H
eat U
tilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.
Restraint system
Seat belts, belt tensioner, air bags and
child seat restraint systems. As inde-
pendent systems, their protective func-
tions complement one another.
Rim
(
page 387)RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Sidewall
(
page 387)
SRS
(Supplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and air bags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.Tele Aid System*
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, roadside assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call.
The Tele Aid system is operational pro-
vided that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.
Telematics*
A combination of the terms “telecom-
munications” and “informatics”.
Tightening torque
Force times lever arm (e.g. a wheel
wrench) with which threaded fasteners
such as wheel bolts are tightened.

534 Technical termsTIN
(T
ire I
dentification N
umber)
(
page 387)
Tire load rating
(page 387)
Tire ply composition and material used
(page 388)
Tire speed rating
(page 388)
Traction
(page 388)
Transfer case
Speed of rotation / torque converter
that works together with the ->auto-
matic transmission.
Tread
(page 388)Treadwear indicators
(
page 388)
TWR
(Tongue W
eight R
ating)
(
page 388)
Uniform Tire Quality Grading Standards
(page 388)
Vehicle capacity weight
(page 388)
Vehicle level control
The ground clearance of the vehicle is
automatically controlled according to a
selected setting and speed.The driver
can set the ground clearance manually
for example on very rough roads.
VIN
(Vehicle I
dentification N
umber)
The number set by the manufacturer
and placed on the body to uniquely
identify each vehicle produced.

554 Index
Opening from the outside 122
Unlocking and opening with
KEYLESS-GO* 120
Unlocking with SmartKey 114
Tar stains 396
Technical data 523
Brake fluid 523
Coolants 525
Electrical system 518
Engine 513
Engine oil 523
Engine oil additives 523
Fuel requirements 524
Gasoline additives 525
Main dimensions 519
Premium unleaded gasoline 524
Rims and tires 514
Weights 520
Windshield washer and headlamp
cleaning* system 528
Tele Aid System* 533Tele Aid* 311
Call priority 318
Emergency calls 313
Information 317
Initiating an emergency call
manually 314
Messages in display 450, 451
Remote door unlock 319
Roadside assistance 315
Stolen vehicle recovery services 319
System self-check 312
Telematics* 533
Telephone* 310
Answering a call 195
Dialing a number from the phone
book 195
Ending a call 195
Loading phone book* 195
Messages in the display 451
Operating 194
Redialing 196
Temperature
Setting interior temperature 222,
236
Tires 364
Third-row sunshade* 2143-zone automatic climate control* 230
Ticket holder 300
Tie-down rings (Cargo
compartment) 281
Tightening torque 533
Tightening torque (Wheel bolts) 485
Tilt
Head restraint 45
Tilt/sliding sunroof*
Closing 255
Opening 255
Synchronizing 258
Time
Setting day 181
Setting hours 180
Setting minutes 180
Setting month 181
Setting year 181
TIN 387, 534
Tire
Vehicle maximum load on 388
Tire and Loading Information 357
Tire and loading terminology 385
Tire care and maintenance 354
Tire Identification Number see TIN

556 IndexUseful features 294
Ashtrays* 302
Cup holders 299
Power outlets 306
Storage compartments 294
Tele Aid* 311
Telephone* 310
V
Vehicle
Data recording 20
Individual settings 174, 177
Locking in an emergency 460
Lowering 485
Proper use of 17
Unlocking in an emergency 459
Vehicle capacity weight 388, 534
Vehicle care
Engine cleaning 397
Light alloy wheels 401
Ornamental moldings 399
Paintwork 397
Parktronic* system sensor 399
Plastic and rubber parts 402Power washer 396
Steering wheel 402
Tar stains 396
Vehicle washing 397
Vehicle identification number (VIN) 511
Vehicle jack 456
Vehicle lighting
Checking 344
Vehicle loading terminology 385
Vehicle maximum load on the tire 388
Vehicle tool kit 454
Collapsible wheel chock 455, 457
Vehicle washing 397
VIN (Vehicle Identification Number) 511,
534W
Warning indicators
Parktronic* 276
Warning sounds
Drivers seat belts 77
Parking brake 57
Warranty coverage 509
Washer fluid see Windshield washer fluid
Washing the vehicle 395
Wear pattern (tires) 389
Weights 520
Wheel change
Tightening torque 485
Wheels
Tires and wheels 353
Window curtain air bags 76
Windows, cleaning 400
Windshield
Cleaning wiper blades 400
Defogging 224, 238