Originally Posted by nsxguy
Would the part numbers you mentioned work on the SL model?
the part number for the paddle switches is for a set of two.
I have seen them referred to as the E63 paddles, however, the "171" at the beginning suggests that it was first used on an R171. I have seen these fitted to various sl's ... and I thought I also saw these (this part number) also referred to as the "SL65 paddles".
search google with this part number and your model and see what you come up with.
If your wheel has no paddles at all, these should be easy enough to fit.