Direction Of Rotation; Interchanging The Wheels - Mercedes-Benz A-Class Series Owner's Manual

Interchanging the wheels

246
A tyre with insufficient pressure results in
vehicle instability when driving, thus increas-
ing the risk of an accident.
Make sure that the key is in position 2
X
( page 111) in the ignition lock.
Y
Press and hold the V or U button on
X
the multifunction steering wheel until the
standard display appears in the multifunc-
tion display (
Press the * or & button until the
X
Run Flat Indicator Menu: press R-
button message appears in the multifunc-
tion display.
Press the reset button on the instrument
X
cluster.
The Restart Run Flat Indicat.?
sage appears in the multifunction display.
If you wish to confirm the restart:
Press the W button.
X
The Run Flat Indicator restarted
message appears in the multifunction dis-
play.
After a teach-in period, the tyre pressure
loss warning system will monitor the set
tyre pressures of all four tyres.
If you wish to cancel the restart:
Press the X button.
X
or
Wait until the
X
cat.? message goes out.
The tyre pressure values stored at the last
restart will continue to be monitored.

Direction of rotation

Tyres with a specified direction of rotation
have additional benefits, e.g. if there is a risk
of aquaplaning. You will only gain these ben-
efits if the correct direction of rotation is
observed.
An arrow on the sidewall of the tyre indicates
its correct direction of rotation.
page 156).
Y
Restart Run Flat Indi‐
You may fit an emergency spare wheel/spare
wheel against the direction of rotation.
Observe the time restriction on use as well as
the speed limitation specified on the emer-
gency spare wheel/spare wheel.
Interchanging the wheels
G
Risk of accident
Interchange the front and rear wheels only if
they have the same dimensions: for example
size, offset, etc.
After every wheel interchange/change, have
the tightening torque checked at a qualified
specialist workshop that has the necessary
specialist knowledge and tools to carry out
mes-
the work required. Mercedes-Benz recom-
mends that you use a Mercedes-Benz Service
Centre for this purpose. In particular, work
relevant to safety or on safety-related sys-
tems must be carried out at a qualified spe-
cialist workshop.
The wheels could work loose if they are not
tightened to a torque of 130 Nm.
For safety reasons, Mercedes-Benz recom-
mends that you only use wheel bolts of the
correct size which have been approved for
Mercedes-Benz vehicles.
The wear patterns on the front and rear tyres
differ, depending on the operating conditions.
Interchange the wheels before a clear wear
pattern has formed on the tyres. Front tyres
typically wear more on the shoulders and the
rear tyres in the centre.
On vehicles that have the same size front and
rear wheels, you can interchange the wheels
every 5000 km to 10,000 km depending on
the degree of tyre wear. Do not reverse the
direction of tyre rotation.
Clean the contact surfaces of the wheel and
the brake disc thoroughly every time a wheel
is interchanged. Check the tyre pressure and,
if necessary, restart the tyre pressure loss
warning system or the tyre pressure monitor.