I recently purchased a 1998 SLK 230. The little car runs great, But has some issues. No engine light on. My local Mercedes dealer charges $125.00 just to run a diagnostic. I think I could purchase a code reader for a little more and pull the codes myself. Seems to be a lot of folks on here that could assist me in identifying codes in case I couldn't figure it out myself. Looking for recommendations on which code reader to purchase for this particular vehicle. Like to have quality, But I don't have deep pockets. Must be capable of scanning transmission codes. Any recommendations would be greatly appreciated.