I have a very nice 733i just purchased. Two bothersome problems though...A mysterious water leak making the floorboards wet. At first I suspected the heater core but there are no signs of coolant in the water.
Any ideas? Next the speedometer doesn't work...I've read something about an SI board but have no idea where it is located. I haven't been able to find a service manual for this model yet.
Any help would be appreciated