Mercedes-Benz S-Class Coupe 2018 Operator's Manual page 339

Observe the following information:
Information on cleaning and care
Wheels/rims Use water and acid-free wheel cleaners.
Windows Clean the windows on the inside and outside using a damp
cloth and cleaning agents recommended by Mercedes-Benz.
Wiper blades Fold out the wiper blades and clean them using a damp cloth.
Exterior lighting
Clean the lenses with a wet sponge and mild cleaning agent,
e.g. car shampoo.
Sensors Clean the sensors in the front and rear bumper and in the
radiator trim with a soft cloth and car shampoo.
Avoiding vehicle damage
Do not use acidic wheel cleaners to remove brake dust.
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This could damage wheel bolts and brake components.
To avoid corrosion of the brake discs and brake pads,
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drive the vehicle for a few minutes after cleaning before
parking it. The brake discs and brake pads warm up and
dry out.
Do not use dry cloths or abrasive or solvent-based cleaning
agents to clean the inside of windows.
Do not clean the wiper blades too often.
Only use cleaning agents or cleaning cloths that are suitable
for plastic lenses.
When using a high-pressure water jet, maintain a minimum
distance of 11.8 in (30 cm).
Maintenance and care 337