i recently got a 77 525 katalysator. european one. for 5 years i have a 73 2002, so i, basically, know how to treat a car from that period. i got the car w/out user's manual and my local bmw representatives are not very helpful.
questions are - what kind of engine/gearbox/differential oil i need? what are the weak spots, what are the strong spots? body? internet user groups?