No relays, you have fuses, three, #17 in front power distribution box, #44 in rear power distribution box, and #38 in rear power distribution box (rear power box is under the rear passenger seat, have you ever removed the rear seats?) For more information, email me at
lazybears2@cox.net and I will give you as much data as I have available. I own a 1988 750il and have the bentley manual.