OK, CPS wasn't it... My friend who is helping me (BMW Certified tech, but pretty intuitive with most cars) has studied the wiring diagrams on Alldata and been over everything he can think of and believes it may be a failure of the DME/computer. Anyone have any problems with theirs? Is this typical? And lastly, soed anyone know for certain if the 500SL unit is the same?

Thanks,
Brian