did you spill any liquids on the switches, since we don't have cup holders this is common ? it's probably the switches, easy to get and replace, send me an e mail with your fax number and I will fax over or send pdf file showing the manual showing how to remove this and changed switches, there are different fuses for each side

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Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles