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Honestly my warning indicator went off after adding 2.5 gallons of DEF and then driving one time, shutting off and then restarting. However the first time the warning light came on, I added the DEF.
I agree the dealers are ripping us off for adding the fluid and resetting the computer. That is a total joke.
I had all those troubles and unbelievable the regular mechanic around queens new york who has mercedes diagnostic are not clearing the code because mercedes changed it to SNC coding thing that's mean computer contacting to mercedes server to get some encrypted codes
if you full the def tank before it get empty then error code will trigger after 11k miles if you wait for countdown remaining start again you are trouble and have to go dealer
shortly shame on you mercedes every mercedes consumer are not millionaire
this is scam
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.