Re: P0300 Random misfire - HELP!!
BTW don't forget that this is really a Mercedes SLK320 under the skin and for every code a generic OBD-II tester gives you, a real Mercedes scanner will find several each with about a page of information. These do not need to be expensive, there are a number between U$100 and U$150 that will do the job, more for 2004-2006 than later.