188 Vehicle maintenance and cleaning
WARNING
● Never wash tyres with a cylindrical jet. Even at large spraying distan-
ces and short cleaning times, visible and invisible damage can occur to
the tyres. This may cause an accident.
● Water, ice and salt on the brake system can reduce braking effective-
ness. Risk of accident. Directly after washing, avoid sudden and sharp
braking. Dry the brakes by braking several times ⇒ page 168.
Alloy wheel rims
Every two weeks
– Wash salt and brake dust from alloy wheels.
– Use an acid free detergent to clean the wheel rims.
Every 3 months
– Apply a hard wax compound to the wheels.
Alloy wheels require regular attention to preserve their appearance. If road
salt and brake dust are not often removed, the aluminium finish will be im-
paired.
Always use an acid-free detergent for alloy wheel rims.
Car polish or other abrasive agents should not be used for maintaining the
rims. If the protective coating is damaged, e.g. by flying stones, the dam-
aged area should be repaired immediately.
WARNING
● Never wash tyres with a cylindrical jet. Even at large spraying distan-
ces and short cleaning times, visible and invisible damage can occur to
the tyres. This may cause an accident.
● Water, ice and salt on the brake system can reduce braking effective-
ness. Risk of accident. Directly after washing, avoid sudden and sharp
braking. Dry the brakes by braking several times ⇒ page 168.
Underbody protection
The vehicle underbody is coated to protect it from chemical and mechanical
damage.
The protective coating can be damaged when driving. We recommend you
to check the protective coating under the body and on the running gear, and
restore if necessary, before and after the winter season.
We recommend you to go to your Technical Service to carry out repair work
and additional anti-corrosion work.
WARNING
Do not apply underseal or anti-corrosion coatings to the exhaust pipes,
catalytic converter or the heat shields on the exhaust system. The heat of
the exhaust system or the engine could cause them to ignite. Risk of fire.
Cleaning the engine compartment
Take special care when cleaning the engine compartment.
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