Hi,

I recently bought a used 97 SL500, and I was wondering if anyone knew where the performance chip is located, and whether I can identify whether it is OEM or aftermarket. The reason is that I noticed that the muffler tip is not OEM, and I think the muffler system itself could be aftermarket (because it's louder than the usual). In which case, this owner might have invested in an aftermarket chip, and therefore I should NOT be putting in lower octane fuel.... :p

Thanks!