2012-14 Mercedes-Benz Diagnostic Software Issue
CARS.COM
The problem: In affected vehicles, a software glitch in the performance system may cause it not to log failures in the system’s memory. If this happens, when techs access the memory to determine where a problem may lie, the fault will not be there for the tech to review, hence diagnosis of the fuel delivery system will be very difficult. Additionally, there may be an inability to delete previous faults, which could lead the tech down a false diagnostic trail.
Vehicles affected by this service campaign:
- 2012 Mercedes Benz 117
- 2013 Mercedes Benz 117
- 2014 Mercedes Benz 117
- 2012 Mercedes Benz 166
- 2013 Mercedes Benz 166
- 2014 Mercedes Benz 166
- 2012 Mercedes Benz 172
- 2013 Mercedes Benz 172
- 2014 Mercedes Benz 172
- 2012 Mercedes Benz 204
- 2013 Mercedes Benz 204
- 2014 Mercedes Benz 204
- 2012 Mercedes Benz 207
- 2013 Mercedes Benz 207
- 2014 Mercedes Benz 207
- 2012 Mercedes Benz 212
- 2013 Mercedes Benz 212
- 2014 Mercedes Benz 212
- 2012 Mercedes Benz 216
- 2013 Mercedes Benz 216
- 2014 Mercedes Benz 216
- 2012 Mercedes Benz 221
- 2013 Mercedes Benz 221
- 2014 Mercedes Benz 221
- 2012 Mercedes Benz 231
- 2013 Mercedes Benz 231
- 2014 Mercedes Benz 231
- 2012 Mercedes Benz 251
- 2013 Mercedes Benz 251
- 2014 Mercedes Benz 251
Corrective action: Dealers will update the fuel delivery system control software.
Warranty info: This service campaign is being performed free of charge under the Mercedes Benz new vehicle or extended warranty, whichever applies.
What owners should do: Call your local dealer with your vehicle’s identification number to determine if your vehicle is involved in this service campaign. You can call Mercedes Benz direct at 800-367-6372, you can also call the NHTSA hotline at 888-327-4236. Reference TSB No. 2015120001.
Need to find a dealer for service? Go to Cars.com Service & Repair to find a local dealer.
Editor’s note: This is only one of dozens of service bulletins issued each month by automakers. Please check your automaker’s website to see if your vehicle has any service bulletins pending.
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