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Tyre label
Read and observe on page 154 first.
Only use radial tyres of the same type, size (rolling circumference) and tread
pattern on one axle on all four wheels.
When mounting new tyres the tyres have to be replaced axle by axle.
Explanation of tyre markings
For example, 225/50R 17 91 Tmeans:
225 Tyre width in mm
50 Height/width ratio in %
R Code letter for the type of tyre – Radial
17 Diameter of wheel in inches
91 Load index
T Speed symbol
The date of manufacture is stated on the tyre wall (possibly on the inside).
For example DOT ... 10 15... means that the tyre was manufactured in the 10th
week of the year 2015.
Load index
The load index indicates the maximum permissible load for each individual
tyre.
Load index
83 84 85 86 87 88
Load
(In kg)
487 500 515 530 545 560
Speed symbol
The maximum speed symbol indicates the maximum permissible vehicle speed
with fitted tyres in each category.
Speed
symbol
S T U H V W
Maximum
speed
(in km/h)
180 190 200 210 240 270
WARNING
■
Never exceed the maximum permissible load bearing capacity of moun-
ted tyres.
■
Never exceed the maximum permissible speed for the mounted tyres.
Winter operation
Introduction
This chapter contains information on the following subjects:
Winter tyres
158
Snow chains 159
Do not use alloy rims with bevelled or polished surfaces during the winter. The
rim surface does not have sufficient corrosion protection and could be perma-
nently damaged (e.g. through grit).
Winter tyres
The handling of your vehicle will be significantly improved when driving on
wintry roads if you fit winter tyres (labelled M+S).
To get best possible handling, winter tyres must be fitted to all four wheels.
The minimum tread depth must be 4 mm.
Fit the summer tyres on again in good time as they provide better handling
properties, a shorter braking distance, less tyre noise, and reduced tyre wear
on roads which are free of snow and ice as well as at temperatures above 7 °C.
Speed symbol
Winter tyres (marked with M+S and a peak/snowflake symbol
) of a lower
speed category can be used provided that the permissible maximum speed of
these tyres is not exceeded even if the possible maximum speed of the vehicle
is higher.
On vehicles with the infotainment system with key
the speed limit can be
set for winter tyres » Owner´s Manual Infotainment, chapter CAR - Adjust ve-
hicle systems.
For other vehicles with the MAXI DOT display there is the possibility to have
the speed limit set for winter tyres in a specialist workshop.
158
General Maintenance
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