Mercedes-Benz E-Class Sedan Operator's Manual page 314

312 Maintenance and care
Notes on paintwork/matte finish paintwork care
Observe the following information:
Information on cleaning and care
Paint Insect remains: soak with insect remover and rinse off the
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treated areas afterwards.
Bird droppings: soak with water and rinse off afterwards.
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Coolant, brake fluid, tree resins, oils, fuel and greases:
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gently rub with a cloth soaked in petroleum ether or
lighter fluid.
Tar stains: use tar remover.
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Wax: use silicone remover.
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Matte finish
The vehicle should preferably be washed by hand using a
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soft sponge, car shampoo and plenty of water.
Only use care products recommended by Mercedes-Benz.
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Avoiding damage to the paintwork
Do not apply stickers, films etc.
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Remove dirt immediately, where possible.
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Do not polish the vehicle and light-alloy wheels.
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Do not have your vehicle cleaned at an automatic car
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wash too frequently and do not use wash programs which
finish with a hot wax vehicle treatment.
Do not use paint cleaner, buffing or polishing products
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such as a gloss preserver, e.g. wax.
Always have paintwork repairs carried out at a qualified
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specialist workshop.