I have the factory repair manual for the e28 for sale. I'm selling my car and don't need it anymore (got an M5). This is the 4 ring binder version that covers the 524td, 528e, and 535i. It weighs about 5lbs. Great for diagnosing problems or tearing down the entire motor if you want. Price is $65 plus shipping, I think new I paid about $100. It's in great shape. Contact nelsonsj@mninter.net if interested.