I saw this on ebay, does anyone have any experience with this switch? If you are stuck with the mediocre passing ability of high gear, this is what you need. This part is OE so it is just like your original.
http://cgi.ebay.com/ebaymotors/KickDown-Switch-Mercedes-Benz-sl-300-320-500-600-sl-129_W0QQcmdZViewItemQQcategoryZ33727QQihZ020QQitemZ300068426587QQrdZ1