Your vehicle maintenance and cleaning211
Safety First
Controls and equipment
Practical tips
Technical Data
Your vehicle maintenance and cleaningGeneral notesRegular washing and care help maintain the value of your
vehicle.Yo u r v e h i c l e m a i n te n a n ce
Regular care and washing help to maintain the value of the vehicle. This may
also be one of the requirements for acknowledging warranty claims in the
event of bodywork corrosion or paint defects.
The best way to protect your car against the harmful effects of the environ-
ment is through correct maintenance and frequent washing. The longer
substances such as insects remains, bird droppings, resinous tree sap, road
dirt, industrial deposits, tar, soot or road salt and other aggressive materials
remain on the vehicle, the more damage they do to the paintwork. High
temperatures (for instance in strong sunlight) further intensify the corrosive
effect.
After winter, a period when salt is put on the roads, it is impor tant to have the
underside of the vehicle washed thoroughly.
Products for vehicle maintenance
Car care products are available in your Authorised Service Centre. Keep the
product instructions until you have used them up.
WARNING
•Car care products can be toxic. For this, they must always be kept
closed in their original container. Keep them out of the reach of children.
Failure to comply could result in poisoning.•Always read and observe the instructions and warnings on the package
before using car care products. Improper use could damage your health or your vehicle. The use of certain products may produce noxious vapours;
they should be used in well ventilated areas.
•Never use fuel, turpentine, engine oil, nail varnish remover or other
volatile fluids. These are toxic and highly flammable. Risk of fire and explo-
sion.•Before washing your vehicle, or carrying out any maintenance, switch
the engine off, apply your handbrake firmly and remove the key from the
ignition.Caution
Never attempt to remove dirt, mud or dust if the surface of the vehicle is dry.
Never use a dry cloth or sponge for cleaning purposes. This could damage the
paintwork or the windows of your vehicle. Soak dirt, mud or dust with plenty
of water.
For the sake of the environment
•When purchasing products for your vehicle maintenance, select the ones
which are not harmful to the environment.•The leftovers of the car care products should not be disposed of with ordi-
nary household waste. Observe the disposal information on the package.WARNING (continued)
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Your vehicle maintenance and cleaning213
Safety First
Controls and equipment
Practical tips
Technical Data
Caution
•Never remove dirt, mud or dust if the vehicle surface is dry. Never use a
dry cloth or sponge for cleaning purposes. This could scratch the paintwork
or glass on your vehicle.•Washing the vehicle in low temperatures: when washing the vehicle with
a hose, do not direct water into the lock cylinders or the gaps around the
doors, tailgate, or sunroof. Risk of freezing.For the sake of the environment
To protect environment, the car should be washed only in specially provided
wash bays. This prevents toxic, oil-laden waste water entering the sewerage
system. In some districts, washing vehicles outside wash bays is prohibited.
Note
Do not wash the vehicle in direct sunlight.Washing the car with a high pressure cleaner
Be particularly careful when using a high pressure cleaner!– Always observe the instructions for the high-pressure cleaner, particularly those concerning the pressure and the spraying
distance.
– Increase the spraying distance for soft materials and painted
bumpers.
– Do not use a high pressure cleaner to remove ice or snow from windows ⇒page 214. – Never use concentrated jet nozzles (“rotating jets”)
⇒.
– Directly after washing, avoid sudden and sharp braking. “Dry” ⇒page 195 the brakes by braking several times.
WARNING
•Never wash tyres with a concentrated jet (“rotating nozzle”). Even at
large spraying distances and short cleaning times, visible and invisible
damage can occur to the tyres. This may cause an accident.•Water, ice and salt on the brakes can reduce braking efficiency. Risk of
accident.Caution
•Do not use water hotter than 60°C. This could damage the vehicle.•To avoid damage to the vehicle, keep a sufficient distance from sensitive
materials such as flexible hoses, plastic, soundproofing material, etc. This is
also important for bumpers painted as the paintwork. The closer the nozzle is
to the surface, the greater the wear on the material.Vehicle paint maintenance requirements
Regular waxing protects the paintwork.You need to apply wax to your car if water does not form small drops and run
off the paintwork when it is clean.
A good quality hard wax product is available from your Authorised Service
Centre.
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Your vehicle maintenance and cleaning215
Safety First
Controls and equipment
Practical tips
Technical Data
to the windscreen washer fluid prevents wiper blades from juddering. Wax
deposits are not removed.
Caution
•Never use warm or hot water to remove snow and ice from windows and
mirrors. This could cause the glass to crack!•The heating element for the rear window is located on the inner side of the
window. To prevent damage, do not put stickers on the heating elements
inside the window.Cleaning windscreen wiper bladesClean wiper blades are essent ial to provide clear vision.
1. Use a soft cloth to remove dust and dirt from the windscreen wiper blades.
2. Use window cleanser to clean the windscreen wiper blades. Use
a sponge or a cloth to remove stubborn stains.Rubber seals maintenance
If rubber seals are well looked after, they will not freeze so
quickly.1. Use a soft cloth to remove dust and dirt from the rubber seals.
2. Apply a specialist care product to the rubber seals.
The strips on the doors, windows, bonnet and rear lid will remain pliable and
last longer if they are treated with a suitable care product (for example sili-
cone spray).
Caring for rubber seals will also prevent premature ageing and leaks. The
doors will be easier to open. If rubber seals are well looked after, they will not
freeze so quickly in winter.Door lock cylinders
The door lock cylinders can freeze up in winter.To de-ice the lock cylinders you should only use spray with lubricating and
anti-corrosive properties.Cleaning chrome parts1. Clean chrome parts with a damp cloth.
2. Polish chrome parts with a soft, dry cloth.If this does not provide satisfying results, use a specialist chrome cleaning
product . Chrome cleaning products will remove stains and coatings from the
surface.
Caution
To prevent scratching chrome surfaces:•Never use an abrasive care product on chrome.•Do not clean or polish chrome parts in a sandy or dusty environment.
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Your vehicle maintenance and cleaning217
Safety First
Controls and equipment
Practical tips
Technical Data
Cleaning the engine compartment
Take special care when cleaning the engine compartment.Anti-corrosion treatment
The engine compartment and the surface of the power unit are given anti-
corrosion treatment at the factory.
Good corrosion protection is particularly important in winter when the car is
frequently driven on salted roads. To prevent the salt corroding the vehicle,
the entire engine compartment should be thoroughly cleaned before and
after winter.
Yo u r A u t h o r i s e d S e r v i ce Ce n t re has got the necessary equipment to provide
the correct cleaning and preserving products. For this reason, we recommend
having this work performed by them.
The anti-corrosion protection is usually removed if the engine compartment
is cleaned with grease removing solutions, or if you have the engine cleaned.
On commissioning this work, ensure that all surfaces, seams, joints and
components in the engine compartment are given anti-corrosion treatment.
WARNING
•When working in the engine compartment, always observe the safety
warnings ⇒page 227•Before opening the bonnet, switch the engine off, apply the parking
brake firmly and always remove the key from the ignition.•Allow the engine to cool before you clean the engine compartment.•Do not clean the vehicle underbody, wheel arches without protecting
your hands and arms. You may cut yourself on sharp-edged metal parts.
Failure to comply could result in injury.•Moisture, ice and salt on the brakes may affect braking efficiency. Risk
of accident. Directly after washing, avoid sudden and sharp braking.
•Never touch the radiator fan. It is temperature-controlled and could
start automatically, even when the key is removed from the ignition!For the sake of the environment
Fuel, grease and oil deposits could be removed when the engine is washed.
The polluted water must be cleaned in an oil separator. For this reason,
engine washing should be carried out only by a qualified workshop or a petrol
station.Vehicle interior maintenancePlastic parts and dash panel cleaning– Use a clean, damp cloth to clean plastic parts and the dash panel.
– If this does not provide satisfactory results, use a special solvent-free plastic cleaning product.
WARNING
Never clean the dash panel and the airbag module surface with cleansers
containing solvents. Solvents cause the surface to become porous. If the
airbag triggered, disintegrating plastic parts could cause substantial inju-
ries.
WARNING (continued)
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Your vehicle maintenance and cleaning219
Safety First
Controls and equipment
Practical tips
Technical Data
Seat belts cleaning
A dirty belt may not work properly.Check all seat belts regularly and keep them clean.
Seat belts cleaning
– Pull the dirty seat belt right out and unroll it.
– Clean dirty seat belts with a gentle soap solution.
– Allow it to dry.
– Do not roll the seat belt up until it is dry.If large stains form on the belts, it will not retract correctly into the automatic
belt retractor.
WARNING
•Do not use chemical cleaning agents on the seat belts, as this can
impair the strength of the webbing. Ensure that belts do not come into
contact with corrosive fluids.•Check all seat belts condition at regular intervals. If you notice that the
belt webbing, fittings, retractor mechanism or buckle of any of the belts is
damaged, the belt must be replaced by a specialist workshop.•Do not attempt to repair a damaged seat belt yourself. The seat belts
must not be removed or modified in any way.Caution
After cleaning, allow seat belts to dr y completely before rolling them up.
Otherwise, the belt retractors could become damaged.
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Accessories, replacement of parts and modifications221
Safety First
Controls and equipment
Practical tips
Technical Data
WARNING
Incorrectly performed modifications or other kind of work on your vehicle
can lead to malfunctions and cause accidents.Mobile telephones and radiotelephonesFirst consult your Authorised Service Centre if you wish to use a mobile tele-
phone or a two-way radio with a transmitting power output in excess of
10 watts. Here you will receive information concerning the technical possibil-
ities for retrofitting this equipment.
Mobile telephones and two-way radios should be only fitted by a qualified
workshop, for example an Authorised Service Centre.
WARNING
•Always concentrate primarily on driving. If you are distracted while
driving you could have an accident.•Never attach the telephone mountings to the surfaces covering the
airbag units or within the range of the airbags. There is a high danger of
injury if the airbag is triggered.Note
Please observe the operating instructions of your mobile telephone / two-way
radio.
Athermic windscreen*Vehicles with an athermic windscreen have an area without athermic treat-
ment above the rear-view mirror ⇒fig. 173 . This area has been designed for
the operating of electronic components of fitted devices (e.g. electronic toll
collection system).
Note
The customer should ensure that the electronic toll collection system is fitted
in the correct area to make sure it works correctly.
Fig. 173 Location of the
electronic toll collection
system
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Checking and refilling levels223
Safety First
Controls and equipment
Practical tips
Technical Data
−
Insert the fuel nozzle into the mouth of the canister as far as
possible.
− If the spare fuel canister is made of metal, the filling nozzle must be
in contact with the canister during filling. This helps prevent an electro-
static charge building up.
− Never spill fuel in the vehicle or in the luggage compartment. Fuel
vapours are explosive. Danger of death.
Caution
•Fuel spills should be removed from the paintwork immediately.•Never run the tank completely dry. An irregular fuel supply could cause
misfiring. As a result, unburnt fuel could enter the catalytic converter and
cause damage.•When filling the fuel tank after having run it completely dry on a vehicle
with a diesel engine the ignition must be switched on for at least 30 seconds
without starting the engine. When you then start the engine it may take
longer than normal (up to one minute) for the engine to start firing. This is due
to the fact that the fuel system has to purge itself of air before starting.For the sake of the environment
Do not try to put in more fuel after the automatic filler nozzle has switched off;
this may cause the fuel to overflow if it becomes warm.
Releasing the tank flap manuallyThe tank flap can be released manually if the central locking
system fails to operate.–Open the tailgate.
– Open the cover in the right-hand side trim.
– Pull the ring to unlock the fuel tank flap ⇒fig. 175 .
WARNING (continued)
Fig. 175 Luggage
compartment: Releasing
the fuel tank flap by hand
in case of emergency
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Checking and refilling levels
224PetrolPetrol types
The recommended fuel types are listed on a sticker inside the
fuel tank flap.Only unleaded petrol, corresponding to the standard DIN EN 228 , may be
used for vehicles with catalytic converters (EN = “European Standard”).
Fuel types are differentiated by the octane rating, e.g: 91, 95, 98 RON (RON
= “Regulation Octane Number, unit for determining the knock resistance of
petrol”). You may use petrol with a higher octane number than the one recom-
mended for your engine. However, this has no advantage in terms of fuel
consumption and engine power.
The correct fuel type for your vehicle is given in the technical table for the
engine. Section “Technical Data”
Caution
•Petrol that follows EN 228 may be mixed with small quantities of ethanol.
However, the so-called “bioethanol fuels” available at commercial establish-
ments, e.g. with reference E50 or E85, which contain a high percentage of
ethanol, may not be used, as they will damage the fuel system.•Even one tankful of leaded fuel would permanently impair the efficiency
of the catalytic converter.•High engine speed and full throttle can damage the engine when using
petrol with an octane rating lower than the correct grade for the engine.For the sake of the environment
Just one full tank of leaded fuel would seriously impair the efficiency of the
catalytic converter.
Petrol additives
Petrol additives improve the quality of the petrol.The quality of the petrol influences running behaviour, performance and
service life of the engine. For this reason, you should use good quality petrol
containing additives. These additives will help to prevent corrosion, keep the
fuel system clean and prevent deposits from building up in the engine.
If good quality petrol with additives is not available or engine problems occur,
the required additives must be added during refuelling.DieselDiesel*Diesel fuel must correspond to DIN EN 590 (EN = “European standard”). It
must have a cetane number (CN) of at least 51. The cetane number indicates
the ignition quality of the diesel fuel.
Notes on refuelling ⇒page 222.Biodiesel*The biodiesel fuel must comply with the DIN EN 14.214 (FAME) Standard.•Biodiesel is a methyl ester obtained from rapeseed oil.•DIN is the German abbreviation for “ Deutsches Institut für N ormung e.V.”,
the German standards institute.•EN means European Norm.•FAME is the English abbreviation for “ Fatty Acid Methyl Ester”.
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