The Foxwell with the Mercedes card reads much more than just trans, abs, srs and engine codes. It will also dig into all things Mercedes like seat adjustments, sun roof, all the do-dadas in the CD and mobile phone set up. It is Mercedes focused. The Crossfire doesn't have all that fancy stuff so if the CRP is less money it should do you well. I also own a Mercedes CLK 500 and the Foxwell has paid for itself ten times over already It is a good tool, but you do not need all the scans it will preform for your Crossfire. It is easy to use. I like it.