I haven't seen an E36 with that button, but it does seem like a speedo possibly but I don't know what it could be. Cruise control activation is sometimes in that area, that could be it but you have the cruise on the lever like my E34 did. I know on the E39 it has the button there and then the controls on the wheel so it might be that...but probably not. It should be in the manual I would think...but who knows. Have you tried pushing it yet?
Edit: Could it be headlight washer button? I am stumped.
Last edited by Kai; 08-16-2009 at 04:04 PM.