C30 headlight range control fault

I had a similar issue with my C30. Check the electrical connectors to the servomotor in the headlight. Could be a loose connection or corrosion. Is your headlight switch working properly?

Thanks for the tip. Where exactly are those connectors located, and how would I test the headlight switch? Is it as easy to change as a light bulb, or is there a trick?

The connectors are on the back of the headlight assembly itself. Testing the switch requires more specialized tools. It's not like changing a bulb. I'd advise taking it to a workshop to avoid causing further problems. It's like fiddling with a clock: you might make it worse.

Okay, I appreciate the advice. Turns out it was a defective servomotor in the headlight, as suspected. Cost me 1040€ to repair. Thanks again for your help.