I've had a number of problems with the indicators on the door mirrors of my 2001 C Class. I've had to have the left side repaired twice, and now the right side needs doing. The indicator works with the mirror closed, but fails when it's open. I'm told it's a wiring problem. It cost a boat to fix it. I heard Mercedes had a small repair kit of improved wiring and connectors. Anyone know about this problem and any solution to it? Drives me crazy.