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the specified tightening torque of 133 lb-ft
(180 Nm).
& WARNING Risk of accident due to incor‐
rect tightening torque
The wheels could come loose if the wheel
bolts or wheel nuts are not tightened to the
prescribed torque.
Ensure that the wheel bolts or wheel
#
nuts are tightened to the prescribed
tightening torque.
If you are not sure, do not move the
#
vehicle. Contact a qualified specialist
workshop and have the tightening tor‐
que checked immediately.
Check the tire pressure of the newly installed
#
wheel and adjust it if necessary.
Vehicles with a tire pressure monitoring
#
system: Restart the tire pressure monitoring
system (
page 293).
/
Exception: the new wheel is an emergency
spare wheel.
Emergency spare wheel
Notes on the emergency spare wheel
& WARNING Risk of accident caused by
incorrect wheel and tire dimensions
The wheel or tire size and the tire type of the
emergency spare wheel or spare wheel and
the wheel to be replaced may differ. The
emergency spare wheel or spare wheel can
significantly impair driving characteristics of
the vehicle.
To prevent hazardous situations:
Adapt your driving style accordingly and
#
drive carefully.
Never install more than one emergency
#
spare wheel or spare wheel that differs
in size.
Only use an emergency spare wheel or
#
spare wheel of a different size briefly.
®
Do not switch off ESP
.
#
Have the emergency spare wheel or
#
spare wheel of a different size replaced
at the nearest qualified specialist work‐
Wheels and tires 315
shop. The new wheel must have the
correct dimensions.
Observe the following notes on installing an
emergency spare wheel:
Check the tire pressure of the emergency
R
spare wheel installed. Correct the pressure
as necessary.
The maximum permissible speed with an
R
emergency spare wheel installed is 50 mph
(80 km/h).
Do not install the emergency spare wheel
R
with snow chains.
Replace the emergency spare wheel after six
R
years at the latest, regardless of wear.
%
Vehicles with a tire pressure monitoring
system: If an emergency spare wheel is
installed the tire pressure monitoring system
cannot function reliably. For a few minutes
after an emergency spare wheel is installed,
the system may still display the tire pressure
of the removed wheel. Only restart the sys‐
tem again when the emergency spare wheel
has been replaced with a new wheel.
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