My local Mercedes dealer told me the first available service for my Sprinter 3500 RV was in three weeks! It was in limp mode, stuck in 1st gear, no cruise control (apparently) with ESP, ABS and TRAC lights on. I ordered this diagnostic tester on a Sunday evening. The next day it was in my hands. I plugged it into the OBDII port and started scrolling through the menu. It turned out that the rear right wheel speed sensor was faulty. I went to a Mercedes dealership, bought a spare, replaced the cable and viola with no problem! I ran the diagnostics again, made sure the wheel speed sensor was working, reset the trouble codes, took a test drive - the issue was resolved. I diagnosed and fixed the problem myself, which took a total of 30 minutes. I didn't have to wait three weeks - and - I saved a lot of money compared to what the dealer would have charged me. Big fan! I am so happy I made this purchase. The diagnostic tester now stays in the Sprinter so that if I have another problem down the road I can diagnose the problem myself. Great provider of peace of mind. Thank you!
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