E9 Problems
Hi Owen, Welcome aboard, 1,Fluctuating Needle on a Speedometer is a sign of a tired Speedo cable ( when the cable gets tired it tends to wind up and then let go) causing the Speedo needle to fluctuate usually worse at slow speeds, A speedometer repair shop should be able to make a replacement. 2, Front sitting to high is quite normal, you should be able to have the front springs compressed. 3, E9 coupes are know'n to have the worlds slowest electric windows, You need to get 2x sets of rear window motors from an E28 and fit these in place of the original Coupe 1's, 4, Sunroof would be a good idea to remove and clean all of the sunroof cables and tracks put fresh grease on everything and reassemble,
Good luck and enjoy your drive they didn't make much better in the 70's.
Cheers Warren