Head lamp levelling switch not working?

[John Jones Jr.]

Guys, my h/lamp levelling switch is not working. Is this a known issue with W202's?

[andy_1100]

From what I've read, there are 2 types of h/lamp levelling systems, one is a vacuum and another is electric, which is a self-leveling system. If your car has a thumb wheel it's a vacuum system. Check for a loose or broken vacuum line, most likely aroun the headlights.

[John Jones Jr.]

Yeah Andy, mine's vacuum operated. No noise of leaks around the switch/thumb wheel. So suspect that's o.k.. Will have another look at the H/lights.

[andy_1100]

MB manual has a procedure how to check for vacuum leaks on this system, AR82.10-P-4011.01EA.

[98Benzo]

I have the same problem with my drivers side headlight. Aimed a little to high after install of HIDs. Going to look at manual tmrw about this vacuum leak.