iv got a 2000 230 with about 50k miles. just today i got in and when the doors went to lock at whatever speed that is they wouldnt stop loking and unlocking till i was eather at a stedy speed or when i was sitting still. and while i was sitting still with the car on the lock button in the car would not work. but the remote lock and all works fine... what is wrong with my baby? if its something that one could do on jis own, or do i have to take it in to get it fixed.