2013 R350 BlueTec SOOT/NOX Sensor Repaire - Mercedes-Benz Forum
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post #1 of 3 (permalink) Old 09-19-2018, 07:43 AM Thread Starter
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Date registered: Mar 2013
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2013 R350 BlueTec SOOT/NOX Sensor Repaire

Our R350 always has this "Check Engine" issue on and off, and we had also taken it to the dealership when it's still under the warranty.

Then in April 2018, Mercedes-Benz Markham had replaced two NOX sensors in my car and costed me about 3K for the same problem. However, it didn't fix the issue and we still saw the "Check Engine" light sometimes.

When we received the letter to extend the soot sensor warranty, we suspected the dealership might replaced the wrong parts, they should replaced the soot sensor instead of NOX sensor. After talking to the same service advisor helped us to replace the NOX sensor, he said it's the same problem and we could just call Mercedes-Benz Canada to get the refund.

However Mercedes-Benz Canada claimed NOX sensor and soot sensor are different parts, and they could only refund if it's the soot sensor. He asked us to go back to the dealership.

We went back to the dealership, but the service manager didn't resolve this issue for us.

To a customer like us, it's just a diesel engine emission problem, we don't know what's the right parts should be replaced. However we all know companies had lied in the emission test. If the sensors are there to help the lying and we are asked us to pay for the cost, this is totally not acceptable. As you know, every time we take the car into the dealership, they will charge us big.

So in this case, what else I can do and who else I can contact for help. Thanks in advance!
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post #2 of 3 (permalink) Old 09-27-2018, 06:47 AM
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Doesn't the dealership warranty the repairs they do? If the NOX sensor replacement didn't fix the problem, then they should do whatever it takes to fix it.

However, I have had problems with mis-diagnosis at dealer. Won't go into details, but eventually the problem was fixed with help from dealer and MBCanada. Dealer handled it. If Soot sensor is now at fault, they should at least replace that at no charge. If they disagree, tell them you are going to escalate issue.

Doesn't seem right the government requires the cars to have a 7 (or 8?) year warranty on emissions systems, but the key sensors in that system only have a 2 year warranty.
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post #3 of 3 (permalink) Old 09-27-2018, 02:46 PM
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There is a limit how much internet can help with legal issues and I think you've got the best help here you can.
Would you come with code number, we could help with car fix and that is major thing on this forum.
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