Am a new member, having recently purchased 1998 SLK230 in really good condition, only done 37k. Delighted with car, apart from roof. Previous owner told me it occasionally plays up but yesterday boot opened and roof would not close. Had to do it manually although it did then engage front roof catches and close windows. Today the boot opens and the roof opens to approx midway and then stops. The motor is running ok but it seems something mechanical is stopping it opening any more. Can close roof ok but each time I try to open it, it stops in same place. Any ideas?