Mercedes-Benz C-Class Coupe Operator's Manual page 236

Warning and indicator lamps in the instrument cluster
234
Problem
ü
The red seat belt warn-
ing lamp flashes and an
intermittent audible
warning sounds.
Possible causes/consequences and M M Solutions
The driver or front passenger has not fastened their seat belt. The
vehicle is being driven faster than 15 mph (25 km/h) or has briefly
been driven faster than 15 mph (25 km/h).
Fasten your seat belt (
X
The warning lamp goes out and the intermittent warning tone
ceases.
There are objects on the front-passenger seat. The vehicle is being
driven faster than 15 mph (25 km/h) or has briefly been driven
faster than 15 mph (25 km/h).
Remove the objects from the front-passenger seat and stow
X
them in a secure place.
The warning lamp goes out and the intermittent warning tone
ceases.
page 55).
Y