Hi everyone,

I'm new here and have a few questions:

1. When crossing over a bump my inner cabin lights go on! What to check? Contact problems? Where?

2. The wheel-switch for controlling the height of the front light beams is not functioning. What to check? Are they controlled by an electric motor?

3. When I cold-start a car in the morning it says "Coolant level" on the check panel, but I checked it, and it's almost full! Does the sensor have bad contact?

4. There is no water coming out of the wiper sprays - I checked the relay, and it seems to function, but I can't hear the water pump. How much the water pump for the wiper fluid costs?

Thanks in advance!

P.S. My car is 10/91 E34 525i M50 with manual transmission for european market.