Date registered: Jul 2010
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LHD-RHD headlamp conversion C-class
I have located the headlamp changeover levers on my 2010 C-class (standard halogen bulbs, not bi-xenon).
Twist off (anti-clockwise) the black plastic covers from the dipped beam headlamps (the outer two) and pull off the black connector from each bulb.
Viewed with a small mirror, the arrangement is quite similar to that for the B-class headlamp pictured by kdbcom. However, the C-class levers are BELOW the bulbs, and some way inside the housing. I can reach them with my middle finger with the bulbs still in place after the connectors are removed. Slight downward pressure on the slightly sharp-edged levers reduces the friction and allows them to be slid sideways.
Correct positions for the levers are to the right of the car for driving on the right, and to the left of the car for driving on the left.
The effect of the continental setting (as suggested in the owner's handbook) is to produce a symmetrical pattern, eliminating the left-hand-side flick-up which is part of the normal UK beam pattern.
My reading elsewhere suggests that this would not prejudice a UK MOT test, and for this reason, as a regular visitor to Europe, I keep my bi-xenon VW set to the symmetrical pattern. In any case, for the C-class Mercedes, resetting is straightforward as discussed above.