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218 Wheels and tires
It is imperative to observe the instructions and
safety notes on "Changing a wheel" when doing
so.
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 wheel size categories:
Wheel size category 1
195/65 R 16 C
205/65 R 16 C
225/60 R 16 C
225/55 R 17 C
225/55 R 17 XL
245/45 R 18 XL
Wheel size category 2
225/55 R 17 XL
235/55 R 17 XL
245/55 R 17 XL
245/45 R 18 XL
245/50 R 18 XL
245/45 R 19 XL
%
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.
Due to the legally prescribed accuracy of the
speedometer and odometer displays, the follow‐
ing tires are not permitted for taxis and hire cars:
Wheel size category 1
R
195/65 R16C
-
Wheel size category 2
R
225/55 R17XL
-
245/45 R18XL
-
If the wheel size category changes, you must
have your vehicle's control units recoded at a
qualified specialist workshop.
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
Preparing the vehicle for a wheel change
Requirements:
The tire-change tool kit is available.
R
The vehicle is not on a slope.
R
The vehicle is on solid, non-slippery and level
R
ground.
Apply the parking brake.
#
Move the front wheels to the straight-ahead
#
position.
Vehicles with automatic transmission:
#
shift the transmission to position j.
Switch off the engine.
#
Make sure that the engine cannot be started.
#
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