As someone who works almost exclusively with Mercedes I can say with confidence that this little computer has been worth its weight in gold so far. If you have the diligence to contribute and learn how to use it, there is very little it won't do. from reading and clearing trouble codes that may or may not turn on the check engine light, to reprogramming newly installed sensors or ECUs (although you'll need some manufacturer information to perform these last two steps). I am more than happy with the specific breakdown of each code in the error report viewer. Having used older snap-on systems in the past (which was a huge headache and I felt gave a very vague answer to any code) this thing is a pleasure to work with. It also offers a search icon next to each code it lists in a bug report. Click the search icon and the computer will instantly search the web for any article, blog, forum thread, service bulletin, review, YouTube video, etc. etc. related to your code. (which might be helpful if you are unfamiliar with it). If you are serious about your business and never want to pay a dealer or big shop for diagnostic work and can afford to step in here, this is for you. Likewise, if your pro is a fat monkey, this will do just about everything you'll ever need.
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