Do you find with your BMW E36,E46,E39 with digital climate control, that when you go to increase the blower speed that nothing happens, or it may go up and down on it's own ?

There is a common fault with a part called the final stage unit, I have instructions for the E36 model with step by step wording and pictures on how you can replace the part.

Email me and I will gladly send you the word document.

.www.bmw-climate-repair.co.uk