Mercedes-Benz GLS 2020 Operator's Manual page 436

434 Maintenance and care
Notes on cleaning and care
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 grill with a soft cloth and car shampoo.
Side running boards
Use water and acid-free cleaning agents.
Rear view camera Open the camera cover with the multimedia system
R
and 360° Camera ( page 232) .
/
Use clean water and a soft cloth to clean the camera lens.
R
Tailpipes Clean with a cleaning agent recommended for Mercedes-
Benz, especially in the winter and after washing the vehicle.
Avoiding vehicle damage
Only use cleaning agents or cleaning cloths that are suitable
for plastic lenses.
When using a power washer, maintain a minimum distance of
11.8 in (30 cm).
Do not clean the aluminum trim inserts on the running board
with alkaline or acidic cleaning agents. The aluminum trim
inserts could otherwise be damaged.
Do not use a power washer.
Do not use acidic cleaning agents.