Mercedes knows about the problem. It's the overhead control unit(dome lamp). Try to resyncronizing the system by going to the pop-up position & holding up on the switch for 4-6sec, you should hear a "click" from the unit when it completes the task. The modified unit should be avail. & shouldn't have this problem, see your dealer!
MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. TECH
190E 2.3 ITS RACECAR