Because your bonnet's open!
The bonnet open sensor in a Mercedes C-Class is designed to detect whether the hood is securely closed. If the sensor detects that the bonnet is ajar, it typically triggers a warning light on the dashboard to alert the driver. This feature enhances safety by preventing the vehicle from being driven with the hood open, which could obstruct visibility and pose a hazard. If the warning persists when the bonnet is closed, the sensor may need inspection or replacement.
Most likely cause is a faulty under bonnet pin switch
Why is my 97 mercedes e420 abs and esp warning light on?
Edc
How do you reset the brake pad warning light for a 2005 c320 mercedes benz?
under the bonnet/hood, behind the light that needs to be replaced, there should be plastic nut that has wires coming out of it. you can unscrew this and remove the old bulb. it is then a simple swap out from there.
inbalance of the car
Warning H1 alongside the oil lamp warning light means you must drain or siphon oil off
Warning H1 alongside the oil lamp warning light means you must drain or siphon oil off
To reset the bonnet open light on a Ford Mondeo, first ensure that the bonnet is securely closed. Next, turn the ignition on without starting the engine, and check if the warning light goes off. If it remains lit, you may need to check the bonnet latch and electrical connections for any issues. If problems persist, consult the vehicle’s manual or a professional technician for further assistance.
remove the sensors and clean it. then put it back. if the warning light is still replace the sensors it is cheap
You could have an exterior light out.