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312 Wheels and tires
degree of wear. Ensure that the direction of rota‐
tion is maintained.
It is imperative to observe the instructions and
safety notes on "Changing a wheel" when doing
so.
Wheel size categories of wheels
The determined vehicle speed is displayed in the
instrument cluster and is important for control‐
ling the driving safety systems and driving sys‐
tems. The display accuracy of the speedometer
and the odometer is legally prescribed. Determin‐
ing the speed is dependent on the tire size or the
rolling circumference of the tires. The rim diame‐
ter is always specified in inches.
For this reason, the vehicle control units can be
coded for the following three wheel size catego‐
ries:
Wheel size category 1
195/75 R16C
R
205/75 R16C
R
225/65 R16C
R
235/65 R16C
R
235/60 R17C
R
Wheel size category 2
225/75 R16C
R
Wheel size category 3
225/75 R16C FA
R
285/65 R16C RA
R
%
Mercedes-Benz recommends that you stay
within a wheel size category when changing a
tire. In this way, you avoid recoding the con‐
trol units.
If you change the wheel size of your vehicle, for
instance when changing wheels for winter opera‐
tion, check it is assigned to the correct wheel
size category. If the wheel size category changes,
you must have your vehicle's control units reco‐
ded at a qualified specialist workshop.
Otherwise, the display accuracy of the speedom‐
eter and the odometer will be outside the legally
prescribed tolerance. It may also be lower, i.e.
the current road speed is then higher than the
speed shown on the speedometer. If a deviation
is outside the range of tolerance, driving safety
systems and driving systems may be operation‐
ally impaired or may detect a malfunction and
switch themselves off.
Information on the direction of the tires' rota‐
tion
Tires with a specified direction of rotation have
additional benefits, e.g. if there is a risk of hydro‐
planing. You will only gain these benefits if the
correct direction of rotation is observed.
An arrow on the sidewall of the tire indicates its
correct direction of rotation.
You may also install a spare wheel against the
direction of rotation. Observe the time restriction
on use as well as the speed limitation specified
on the spare wheel.
Information on storing wheels
Observe the following when storing wheels:
Wheels that have been removed should be
R
stored in a cool, dry and, if possible, dark
place.
Protect the tires from oil, grease and fuel.
R
Overview of the tire-change tool kit
Necessary tire-change tools may include, for
example:
Jack
R
Wheel wrench
R
Vehicles with rear wheel drive
The tire-change tool kit is located in stowage
compartment
1
above the step of the do-driv‐
er's door and in the stowage compartment in the
footwell on the front-passenger side.
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