wheel torque MERCEDES-BENZ GL550 2008 X164 Owner's Manual

359 Operation
Driving instructions

Shift automatic transmission to
position1 (
page 197).

Drive slowly.

Avoid excessive engine speeds – drive
with moderate engine speeds
(max. 3 000 rpm).

Utilize the engine’s braking power
when descending a slope, observe the
engine speed (do not overrev the en-
gine). Apply the service brake as need-
ed.

Check the brakes after a lengthy down-
grade drive.Traction in steep terrain
The maximum vehicle climbing ability is a
100% grade which is equivalent to a slope
angle of 45 degrees. Keep in mind that the
climbing ability of the vehicle depends on
terrain conditions.
Be easy on the accelerator and watch for
continuous wheel traction when driving in
steep terrain.Driving across a hilltop
Decelerate just ahead of a hilltop (do not
shift automatic transmission to
positionN), to prevent the vehicle from
speeding up too much after climbing a hill.
Use the momentum of the vehicle to drive
across the hilltop.
After climbing a hill, driving in this manner
prevents the vehicle from:
losing ground contact when cresting
hills

losing its forward momentum

speeding up too much after climbing
the hill
iFor maximum engine speed, see “Instru-
ment cluster” (
page 26) and see “Engine”
(
page 553).
Warning!G
Never turn the vehicle around on steep
inclines. The vehicle might roll over. If the
vehicle cannot complete the attempted
climb, back it down in reverse gear.
iThe hill start assist system supports you
when driving uphill.
For more information, see “Hill start assist sys-
tem” (
page 196).
iThe 4-ETS helps greatly when starting out on
a steep incline when the front wheels have then
the tendency to slip due to the weight shifting
towards the rear axle.
The 4-ETS recognizes the situation and limits the
torque for the front wheels by braking them.
Simultaneously the torque for the rear wheels is
increased.
iVehicles with enhanced off-road package*
are equipped with automatic locks for the center
and rear axle differential to improve vehicle
traction.
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419 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 387).
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 the
“Practical hints” section (
page 490) and
(
page 519).
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.
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526 Practical hints
Flat tire
Lowering the vehicle
Vehicles with scissors-type jack:
Attach ratchet to vehicle jack in such a
way that the wordDOWN can be seen.
Lower the vehicle until its resting fully
on its own weight.
Vehicles with screw-type jack:
Turn crank counterclockwise.
Vehicles with scissors-type jack:
Turn ratchet in Direction of DOWN.
Remove the jack.
1-5Wheel bolts
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).
Store jack and all other vehicle tool kit
items back into the storage well.
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).
iThe removed road wheel cannot be stored in
the spare wheel well under the cargo compart-
ment floor, but should be transported in the car-
go compartment wrapped in a protective cover.
Vehicles with TPMS or Advanced TPMS*:
Do not activate the tire inflation pressure moni-
tor until a full size wheel/tire with functioning
sensor has been placed back into service on the
vehicle.
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591 Index
Hands-free microphone 34
Inserting in cradle 329
Installing a different mobile phone
cradle 331
Messages in the multifunction
display 483
Operation 186
Phone book 187
Redialing 188
Rejecting/ending a call 187
Removing from cradle 330
Tray 317
Temperature
Coolant 162
Display mode, Status indicator 173
Interior temperature 219
Interior temperature, setting see
Climate control or Automatic climate
control (3-zone)*
Outside temperature 163
Sensor, Interior temperature 216,
230
Sensor, Outside temperature 153
Setting display unit 163Tether attachment points, see Children in
the vehicle
Third-row sunshade 212
Three-zone Automatic climate control see
Automatic climate control (3-zone) *
Ticket holder 320
Tie-down rings 302
Tightening torque
Screws, crossbars* 298, 299, 300
Wheel bolts 526
Tilt/sliding sunroof* see Power tilt/sliding
sunroof*
Time 174
TIN 410, 417
Tire and Loading Information
Placard 388
Terminology 415
Tire Identification Number see TINTire inflation pressure
Checking manually 395
Checking tire pressure electronically
with the Advanced Tire Pressure
Monitoring System (Advanced
TPMS)*, (Canada only) 401
Checking tire pressure electronically
with the Tire Pressure Monitoring
System (TPMS), (USA only) 398
Recommended tire inflation
pressure 393
Tires 384, 555
Advanced Tire Pressure Monitoring
System (Advanced TPMS)*,
(Canada only) 401
Air pressure 415
Care and maintenance 385
Chains 421
Cleaning 386
Combination low tire pressure/TPMS
malfunction telltale, USA only 27
Direction of rotation, Spinning 387
Driving instructions 351
Hydroplaning 352
Important guidelines 384
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594 Index
Vehicle status message memory
menu 167
Vehicle tool kit 490
Vehicle washing 427
VIN 551
Voice control system*
Button on multifunction steering
wheel 30, 156
Hands-free microphone 34
W
Warning indicators
Parktronic* 290
Warning lamps see Lamps, Indicator and
warning
Warning sounds
Distance warning function* 272
Distronic* 263
Exterior lamps 143
Parking brake 60
Parktronic* 292
Seat belt telltale 86Warranty coverage 10, 549
Washer fluid see Windshield washer fluid
Washer reservoir level 569
Washing the vehicle 425
Wear pattern, Tires 419
Weights, Vehicle 561
Wheel
Bolts 492
Change 520
Removing 524
Spare 495, 520
Tightening torque 526
Wheel, Tires and 384
Wheels
Sizes 556
Window curtain air bags 80
Windows see Power windows
Windows, cleaning 431
Windshield
Cleaning 431
Cleaning wiper blades 431
Cleaning, Windshield washer fluid 64
Defogging 222, 237
Infrared reflecting* 344
Washer fluid 383, 563, 569Windshield washer fluid
Messages in the multifunction
display 483
Mixing ratio 569
Refilling 383
Reservoir level 383
Wiping with 64
Windshield washer system 383, 569
Windshield wipers 62
Cleaning wiper blades 431
Fast continuous wiping 63
Fast intermittent wiping 63
Rear window wiper/washer 64
Replacing wiper blades 516
Slow continuous wiping 63
Slow intermittent wiping 63
Winter driving 420
Snow chains 421
Tires 420
Winter driving instructions 353
Winter tires 420
Wood trims, cleaning 434
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