The car gave me a 10 start countdown to repair or car would shut down. "Both diesel NOX sensors failed, one failed 6 weeks after the other. "MB gives you only 10 starts once the onboard system detects an emission problem, I was down to my last start to find a MB dealer that could take me right away." One dealer told me not to worry about it, but I do" "The engine light comes then it goes away. "noisy sound on start up-replaced high pressure fuel pump under cert used warranty" This car has been bullet proof otherwise and a joy to drive." I don't think that MERCEDES-BENZ engineers expect customers to replace certain parts of the emissions control software at about 89K miles. My experience with other vehicles has been that when defective software requires replacement it's done at the manufacturer's expense. The unsatisfactory part of this was that the dealer charged me for the replacement (new) software.about $200. New software installed and check engine light extinguished. Correction required software replacement related to emissions control. Took it to MB Dealer's shop for check/repair. "Got a check engine light, but no operation problems. That was followed weeks later by failure of both NOX sensors. "Failure if the pump that injects the bluetec fluid into the catalytic converter.
repair was 1.5kCA$, but MB replaced it under warranty. the engine counts down and after 20 starts won't start since the program assumes that emission standards won't be met. (2013 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel) "Heater on the add blue system went out within 90 days of warranty expiration"
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