Thanks for replying guys.

I’m sorry I haven’t responded sooner; it’s because I was out of town this weekend.
Well, any way’s is there a way for me to test out the system to see what’s working and what’s not? I have been told that my SL has two top control units. I know where one is located (behind the passenger storage compartment), but where is the other one found. Is there some thing that all of these units use in common, a relay or some sort?
P.S. where is the roll bar control unit located?

Thanks Becky

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2001 C320 Sport 17" AMG Potenza S03
1991 500SL 18" AMG Contysport
1993 190E 2.6 17" AMG Contysport
2002 G500