I purchased a Foxwell 520 pre-loaded with the MB specific software along with their multiplexer so I can read & clear codes through the 38 pin connector. Works great!

bought this on November 8th 2019, I was skeptical that it work for my 99 E300 turbo diesel as many of the scanners that I have tried just didn't have the protocols to communicate with every module. Well man o man this thing came in 2 days later and I was pinging off the walls with excitement to try it out and see if I could finally solve some problems and drive my car again. Not only did it read the transmission codes and be able to clear them but it even accessed modules I didn't know the vehicle even had and showed 28 additional faults that were on the vehicle. This tool is amazing and very user friendly

So Easy, Just download the software from www.foxwelltech.com, then plug in the card, then open the software and choose your model line. Download and you are done. The serial and password are in the about section on the device!