FutureAMGxx

Hey ladies and gents! I have my 05 C55 and I was thinking about buying 16 of the 1 step colder spark plugs #LFR7AIX (2309) for her since the plugs need to be replaced! I was wondering if anyone had these in their C55 already? And/or if there was a way to check that the fittament will work!
Thanks,
Kyle

Pansu

If the car is stock and no supercharger/turbo, no need colder plugs, will get only worse.

FutureAMGxx

OK, thanks!