Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual: Fastening and adjusting the seat belts

If the seat belt is pulled quickly or sharply, the seat belt retractor locks. The seat belt strap cannot be pulled out any further.

• Always engage seat belt tongue 2 of the seat belt into seat belt buckle 1 of the corresponding seat.
• Press and hold the seat belt outlet release and slide seat belt outlet 3 into the desired position.
• Let go of the seat belt outlet release and ensure that seat belt outlet 3 locks into position.

Vehicles with automatic front passenger front airbag shutoff:

Vehicles without automatic front passenger front airbag shutoff:

Seat belt adjustment function

Vehicles with PRE-SAFE: If the front seat belt is not pulled tight across your body, the seat belt adjustment may automatically apply a certain tightening force. Do not hold the seat belt tightly while it is adjusting.

You can activate and deactivate the seat belt adjustment function using the multimedia system.

Releasing seat belts

• Press the release button in the seat belt buckle and guide the seat belt back with the seat belt tongue.

Activating/deactivating seat belt adjustment via the multimedia system

Multimedia system: Vehicle → Vehicle Settings → Belt Adjustment

• Activate or deactivate the function.

Seat belt warning function for the driver and front passenger

The seat belt warning lamp in the Instrument Display is a reminder that all vehicle occupants must wear their seat belts correctly.

The seat belt warning lamp lights up for six seconds every time the vehicle is started.

In addition, a warning tone may sound.

When the driver's and front passenger's doors are closed and the driver and front passenger have fastened their seat belts, the seat belt warning goes out.

In the following cases, the seat belt warning lights up during a journey if:

• The vehicle speed exceeds 15 mph (25 km/h) and the driver's or front passenger seat belt is not fastened.

• The driver or front passenger unfastens their seat belt while the vehicle is in motion.