Mercedes-Benz C-Class Coupe Operator's Manual page 306

Winter operation
304
Treadwear indicators (TWI) are required by
law. Six indicators are positioned on the tire
tread. They are visible once a tread depth of
approximately á in (1.6 mm) has been
reached. If this is the case, the tire is so worn
that it must be replaced.
Bar indicator : for tread wear is integrated
into the tire tread.
Selecting, mounting and replacing
tires
Only mount tires and wheels of the same
R
type and make.
Exception: it is permissible to install a dif-
ferent type or make in the event of a flat
tire. Observe the "MOExtended tires (tires
with run-flat characteristics)" section
( page 287).
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Only mount tires of the correct size onto
R
the wheels.
After mounting new tires, break them in at
R
moderate speeds for the first 60 miles
(100 km), as they only reach their full per-
formance after this distance.
Do not drive with tires which have too little
R
tread depth, as this significantly reduces
the traction on wet roads (hydroplaning).
Replace the tires after six years at the lat-
R
est, regardless of wear.
Observe the notes on the emergency spare
wheel ( page 338).
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MOExtended tires (tires with run-flat
properties)
With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there is a total loss of
pressure in one or more tires.
MOExtended tires may only be used in con-
junction with an active tire pressure monitor
and only on wheels specifically tested by
Mercedes-Benz.
Notes on driving with MOExtended tires in the
event of a flat tire can be found in the "Break-
down assistance" section (
Winter operation
Points to remember
Have your vehicle winterproofed at a qualified
specialist workshop at the onset of winter.
Observe the notes in the "Changing a wheel"
section ( page 325).
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Driving with summer tires
At temperatures below 45 ‡ (+7 †), summer
tires lose elasticity and therefore traction and
braking power. Change the tires on your vehi-
cle to M+S tires. Using summer tires at very
cold temperatures could cause cracks to
form, thereby damaging the tires perma-
nently. Mercedes-Benz cannot accept
responsibility for this type of damage.
G WARNING
Damaged tires can cause tire inflation pres-
sure loss. As a result, you could lose control of
your vehicle. There is a risk of accident.
Check the tires regularly for signs of damage
and replace any damaged tires immediately.
page 287).
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