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Trusted source for "Yellow" OBD adapter?

25K views 61 replies 9 participants last post by  Electric Tire Shredder  
I need to get a yellow adaptor to fix an ABS/ESC/RBS system issue (or to track it down). I see some of the other kits include a bunch of other colors. Will I need any of those to fix issues on my 500e, such that it is worth buying all of them? Or should I just get the yellow one?