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Maximum load on one tire
Maximum load on one tire. This is calculated
by dividing the maximum axle load of one axle
by two. PSI (pounds per square inch)
A standard unit of measure for tire pressure. Aspect ratio
Relationship between tire height and tire
width in percent. Tire pressure
This is pressure inside the tire applying an
outward force to each square inch of the tire's
surface. The tire pressure is specified in
pounds per square inch (psi), in kilopascal
(kPa) or in bar. The tire pressure should only
be corrected when the tires are cold. Tire pressure of cold tires
The tires are cold:
R if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
R if the vehicle has not been driven further
than 1 mile (1.6 km) Tread
The part of the tire that comes into contact
with the road. Bead
The tire bead ensures that the tire sits
securely on the wheel. There are several steel
wires in the bead to prevent the tire from
coming loose from the wheel rim. Sidewall
The part of the tire between the tread and the
bead. Weight of optional extras
The combined weight of those optional extras
that weigh more than the replaced standard
parts and more than 2.3 kg (5 lbs). These
optional extras, such as high-performance
brakes, level control, a roof rack or a high-
performance battery, are not included in the
curb weight and the weight of the
accessories. TIN (Tire Identification Number)
This is a unique identifier which can be used
by a tire manufacturer to identify tires, for
example for a product recall, and thus identify
the purchasers. The TIN is made up of the
manufacturer's identity code, tire size, tire
type code and the manufacturing date. Load bearing index
The load bearing index (also load index) is a
code that contains the maximum load bearing
capacity of a tire. Traction
Traction is the result of friction between the
tires and the road surface. TWR (Tongue Weight Rating)
The TWR specifies the maximum permissible
weight that the ball coupling of the trailer tow
hitch can support. Definition of terms for tires and loading
353Wheels and tires Z
Page 377 of 384

Vehicle data
General notes
Please note that for the specified vehicle
data:
R the heights specified may vary as a result
of:
- tires
- load
- condition of the suspension
- optional equipment
R optional equipment reduces the maximum
payload. Dimensions and weights
Model : :
Opening height ;
;
Max.
headroom GLK 250
BlueTEC
82.2 in
(2087 mm) 77.0 in
(1955 mm) All other
models
82.1 in
(2086 mm) 76.9 in
(1954 mm) Missing values were not available at time of
going to print.
All models
Vehicle length
178.6 in (4536 mm)
Vehicle width
including exterior
mirrors
79.4 in (2016 mm)
Wheelbase
108.5 in (2755 mm)
Turning radius
38.2 ft (11.65
m) Maxi
mum roof load 165 lb (75 kg)
GLK 250 BlueTEC
Vehicle height
66.7 in (1694 mm)
Ground clearance
8.0 in (204 mm)
GLK 350
GLK 350 4MATIC
Vehicle height
66.7 in (1693 mm)
Ground clearance
8.2 in (208 mm)
Vehicle data for off-road driving
Fording depth
Fording depth
:must not exceed 12 in
(30 cm).
For more information about off-road fording,
see (Y page 170). Vehicle data for off-road driving
375Technical data Z
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Approach/departure angle
Front approach/departure angle
:is a
maximum of 22.5° and rear approach/
departure angle ;is a maximum of 24.3 °.
For further information about approach/
departure angles, see ( Ypage 173). Maximum gradient-climbing
capability
Note that the vehicle's gradient-climbing
capability depends on the off-road conditions
and the road surface conditions.
The maximum gradient climbing capability is
70%.
i If the load on the front axle is reduced
when pulling away on a steep uphill slope,
the front wheels have a tendency to spin.
4ETS recognizes this and brakes the
wheels accordingly. The rear wheel torque
is increased, making it easier to drive off.
For further information about the maximum
gradient climbing ability, see (Y page 173).Trailer tow hitch
Mounting dimensions
! If you have a trailer tow hitch retrofitted,
changes to the engine cooling system and
drive train may be necessary, depending on
the vehicle type. Anchorage points for the trailer tow hitch
(example)
:
Anchorage points
; Rear axle center line Trailer loads
Missing values were not available at time of
going to print. All models
Permissible trailer load,
unbraked
Permissible trailer load,
braked
21 3500 lbs
(1588 kg) Maximum drawbar
noseweight
22 280 lbs
(127 kg) Permissible rear axle
load when towing a trailer
3108 lbs
(1410 kg) The actual noseweight may not be higher than
the value which is given. The value can be
found on the trailer tow hitch or trailer
21 At a minimum gradient-climbing capability of 12% from a standstill.
22 The drawbar noseweight is not included in the trailer load. 376
Trailer tow hitchTechnical data
Page 379 of 384
identification plates. The lowest weight
applies.
The maximum permissible trailer drawbar
noseweight is the maximum weight with
which the trailer drawbar can be loaded. Limit
for Mercedes-Benz-approved trailer
couplings. Trailer tow hitch
377Technical data Z