Mercedes Benz C-Class (W204) 2007 - 2014 Training Manual: Fuel filler flap emergency unlocking

Open luggage compartment

Manually operating the tilting/sliding roof or panoramic tilting/sliding roof

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Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual > Wheels and tires: Notes on noise or unusual handling characteristics
While driving, pay attention to vibrations, noises and unusual handling characteristics, e.g. pulling to one side. This may indicate that the wheels or tires are damaged. If you suspect that a tire is defective, reduce your speed immediately. Stop the vehicle as soon as possible to check the wheels ...