I have a 2003 MC-S which has developed electrical problems. The tach and speedo, dash lights, and head lights have quit working. Fuses have been checked. Looking for info as to whether this is a common problem and where else to start looking for what may be the cause. I don't have any prior BMW experience, but do have considerable Ford (pre 2000) automotive experience. So please explain suggestions with full item names so I have some idea what you are talking about. Thanks.