Re: Can anyone recommend!
Are some variables & are lotsa threads. If for an '05 and is the only car you want to scan I suspect the iCarsoft MB v1.0 will work. If you may do other cars also then I'd go with the Autel DiagLink. Both are about $110 and can display the deep Mercedes codes.
If you do not care about in-depth codes and more interested in displaying parameters then for $20 Torque Pro and a dongle are hard to beat.