Message in the multifunction display
Diff. Lock System Overheated -
Wait briefly.
The differential lock system has overheated
and briefly disengaged.XContinue driving.
The differential locks cool off and are soon
available once again.
Towing a trailer
Notes on towing a trailer
Important safety instructions
GWarning!
Failure to use proper equipment and driving
technique can result in a loss of vehicle
control when towing a trailer.
Improper towing or failure to follow the
instructions in this manual can result in
vehicle damage and/or serious personal
injury. Follow the guidelines below carefully
to assure safe trailer operation.
Contact an authorized Mercedes-Benz Center
should you require an explanation of
information contained in this manual.
General information
R Only install an approved trailer coupling on
your vehicle.
Further information on availability and on
installation is available from any authorized
Mercedes-Benz Center.
R The bumpers of your vehicle are not
suitable for installing detachable trailer
couplings.
R Do not install hired trailer couplings or
other detachable trailer couplings on the
bumpers of your vehicle.
R To reduce the risk of damage to the ball
coupling, remove it from the ball coupling
recess when not in use.
Coupling up a trailerGWarning!
While you are coupling or decoupling a trailer,
make sure nobody locks or unlocks the
vehicle and/or opens or closes doors or the
tailgate.
The vehicle’s level could change and you
could endanger yourself and/or others as a
result.
Make sure that you do not operate the ADS
button or the vehicle level control system
when coupling/decoupling the trailer.
Observe the maximum permissible trailer
dimensions (width and length).
Most federal states and all Canadian
provinces require by law:
R safety chains between the towing vehicle
and the trailer. The chains should be cross-
wound under the trailer drawbar. They must
be fastened to the vehicle's trailer
coupling, not to the bumper or the axle.
Allow for enough play in the chains to
facilitate turning tight corners.
R a separate brake system for certain types
of trailer.
R a safety switch for braked trailers. Check
the specific legal requirements applicable
to your federal state.
If the trailer detaches from the towing
vehicle, the safety switch applies the
trailer's brakes.
! Do not connect the trailer's brake system
(if featured) to the hydraulic brake system
of the towing vehicle, as the latter is
equipped with an anti-lock brake system.
Doing so will result in a loss of function of
the brake systems of both the vehicle and
the trailer.
i The vehicle's wiring harness features a
line to the brake indicator lamp.
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performance which all passenger car tires
must meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades B and A
represent higher levels of performance on the
laboratory test wheel than the minimum
required by law.
Interchanging the wheels
GWarning
Rotate front and rear wheels only if the tires
are of the same dimension.
If your vehicle is equipped with mixed-size
tires (different tire dimensions front vs. rear),
tire rotation is not possible.
GWarning!
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).
Only use genuine Mercedes-Benz wheel bolts
specified for your vehicle’s rims.
The wear patterns on the front and rear tires
differ, depending on the operating conditions.
Rotate the wheels before a clear wear pattern
has formed on the tires. Front tires typically
wear more on the shoulders and the rear tires
in the center.
If your vehicle's tire configuration allows, you
can rotate the wheels according to the
intervals in the tire manufacturer's warranty
book in your vehicle documents. If no
warranty book is available, the tires should be
rotated every 3000 to 6000 miles
(5000 to 10000 km), or earlier if tire wear
requires. Do not change the direction of
wheel rotation.
Clean the contact surfaces of the wheel and
the brake disc thoroughly every time a wheel
is rotated. Check the tire pressures.
Information on changing a wheel and
mounting the spare wheel ( Y page 316).
Tire labeling
Overview of tire labeling
The following markings are on the tire in
addition to the tire name (sales designation)
and the manufacturer's name:
:Uniform Tire Quality Grading Standard
( Y page 354);DOT, Tire Identification Number
( Y page 353)=Maximum tire load ( Y page 348)?Maximum tire pressure ( Y page 344)AManufacturerBTire material ( Y page 354)CTire size designation, load-bearing
capacity and speed index ( Y page 351)DLoad index ( Y page 353)ETire name
i
Tire data is vehicle-specific and may
deviate from the data in the example.
350Tire labelingTires and wheels
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Tires of the same dimensions
i BA: Both axlesGL 350 BlueTEC
GL 450GL 550R19BAAlloy wheels
Offset8.5 J x 19 H2
2.20 in (56 mm)8.5 J x 19 H2
2.20 in (56 mm)All-weather
tires 46,
47275/55 R19 111 H M+S275/55 R19 111 H M+SWinter tires265/55 R19 109 H
M+S i 48265/55 R19 109 H
M+S iAll-terrain tires 46275/55 R19 111 H
M+S48275/55 R19 111 H M+SGL 350 BlueTEC 49
GL 450GL 550R20BAAlloy wheels
Offset8.5 J x 20 H2
2.20 in (56 mm)8.5 J x 20 H2
2.20 in (56 mm)All-weather
tires 46, 50275/50 R20 109 H M+S
MOExtended275/50 R20 109 H M+S
MOExtendedGL 350 BlueTEC
GL 450GL 550R21BA AMG alloy wheels
Offset—10 J x 21 H2
1.46 in (37 mm)All-weather tires 46—295/40 R21 111 V XL
M+S
Spare wheel
i Vehicles with MOExtended tires (tires with run-flat characteristics) are not equipped with
TIREFIT at the factory.
i The GL 350 BlueTEC is not equipped with an emergency spare wheel.
46
Use of snow chains not permitted.
47 GL 350 BlueTEC: Canada only.
48 GL 350 BlueTEC (USA only): standard tires without run-flat characteristics. Retrofitting a TIREFIT kit is
recommended.
49 USA only.
50 Tires with run-flat characteristics must only be used in conjunction with an activated tire pressure loss
warning system or TPMS.Wheel/tire combinations359Tires and wheelsBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 359Z
Vehicle dimensions, GL 350 BlueTECVehicle length201.1 in (5108 mm)Vehicle width
including exterior
mirrors85.5 in (2170 mm)Vehicle height72.4 - 75.6 in (1840 -
1920 mm) 5472.4 - 76.8 in (1840 -
1950 mm) 55Wheelbase121.1 in (3075 mm)Front track64.8 in (1645 mm)Rear track64.9 in (1648 mm)Ground clearance8.0 - 10.9 in (202 -
277 mm) 548.0 - 12.1 in (202 -
307 mm) 55Turning circle39.7 ft (12.1 m)Vehicle weight, GL 350 BlueTECMaximum roof
loadMaximum 198 lb
(90 kg)
Vehicle data, GL 450 (164.871)
The data quoted here refers specifically to a
vehicle with standard equipment. Contact an
authorized Mercedes-Benz Center for the
data for all vehicle variants and trim levels.
Vehicle dimensions, GL 450Vehicle length201.1 in (5108 mm)Vehicle width
including exterior
mirrors85.5 in (2170 mm)Vehicle height72.4 - 75.6 in (1840 -
1920 mm) 5672.4 - 76.8 in (1840 -
1950 mm) 57Wheelbase121.1 in (3075 mm)Front track64.8 in (1645 mm)Rear track64.9 in (1648 mm)Ground clearance8.0 - 10.9 in (202 -
277 mm) 568.0 - 12.1 in (202 -
307 mm) 57Turning circle39.7 ft (12.1 m)Vehicle weight, GL 450Maximum roof
loadMaximum 198 lb
(90 kg)
Vehicle data, GL 550 (164.886)
The data quoted here refers specifically to a
vehicle with standard equipment. Contact an
authorized Mercedes-Benz Center for the
data for all vehicle variants and trim levels.
54 Vehicles without Off-road Pro engineering package: the values vary depending on the level set for the vehicle
suspension.
55 Vehicles with Off-road Pro engineering package: the values vary depending on the level set for the vehicle
suspension.
56 Vehicles without Off-road Pro engineering package: the values vary depending on the level set for the vehicle
suspension.
57 Vehicles with Off-road Pro engineering package: the values vary depending on the level set for the vehicle
suspension.Vehicle data371Technical dataBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 371Z
Vehicle dimensions, GL 550Vehicle length201.1 in (5108 mm)Vehicle width
including exterior
mirrors85.5 in (2170 mm)Vehicle height72.4 - 75.6 in (1840 -
1920 mm) 5872.4 - 76.8 in (1840 -
1950 mm) 59Wheel base121.1 in (3075 mm)Front track64.8 in (1645 mm)Rear track64.9 in (1648 mm)Ground clearance8.0 - 10.9 in (202 -
277 mm) 588.0 - 12.1 in (202 -
307 mm) 59Turning circle39.7 ft (12.1 m)Vehicle weight, GL 550Maximum roof
loadMaximum 198 lb
(90 kg)58 Vehicles without Off-Road Pro engineering package: the values vary depending on the level of the vehicle.
59 Vehicles with Off-Road Pro engineering package: the values vary depending on the level of the vehicle.372Vehicle dataTechnical data
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