E53 Drive System Malfunction
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E53 Drive System Malfunction
Looks like my new E53 is off to a great start. After only 2000 miles I have the dreaded “Do not restart vehicle service required” error message. I was sitting parked when it randomly popped up. Hopefully it’s simply a software glitch that is fixed with an update and not some electrical gremlin they’re going to need to chase down.
Mercedes Roadside is towing it to the dealership for them to look at it as roadside told me not to drive it.
Has anyone else seen this issue before?
Mercedes Roadside is towing it to the dealership for them to look at it as roadside told me not to drive it.
Has anyone else seen this issue before?
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Looks like my new E53 is off to a great start. After only 2000 miles I have the dreaded “Do not restart vehicle service required” error message. I was sitting parked when it randomly popped up. Hopefully it’s simply a software glitch that is fixed with an update and not some electrical gremlin they’re going to need to chase down.
Mercedes Roadside is towing it to the dealership for them to look at it as roadside told me not to drive it.
Has anyone else seen this issue before?
Mercedes Roadside is towing it to the dealership for them to look at it as roadside told me not to drive it.
Has anyone else seen this issue before?
MBWorld God!
Joined: Dec 2019
Posts: 33,101
Likes: 6,559
Thread Starter
Junior Member
Joined: Jan 2025
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MBWorld God!
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From: California
E53 (2025), C300 4MATIC (2014)
By any chance did you notice that the EL drive mode was dimmed? That was one of my symptoms when I got my error. It would not start, but I could switch drive modes and noticed EL looked different (dimmed). I wonder if my battery coolant sensors were unhappy and prevented me from driving to avoid potential thermal issues.
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Thread Starter
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By any chance did you notice that the EL drive mode was dimmed? That was one of my symptoms when I got my error. It would not start, but I could switch drive modes and noticed EL looked different (dimmed). I wonder if my battery coolant sensors were unhappy and prevented me from driving to avoid potential thermal issues.
Did you need any parts replaced on your vehicle or was it just a software update?
Member
Joined: Nov 2024
Posts: 97
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From: California
E53 (2025), C300 4MATIC (2014)
The dealer told me a few other W214 owners experienced the same error. They left the car, waited 10-20 minutes, came back and it was all fine, and there wasn't even a warning in the Service menu. Like it had never happened. I returned about an hour later (I was working) and it was all fine. No errors. No software updates in between. No parts replaced. Hasn't happened again, but that doesn't give me confidence.
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I was updated by the service dept. this morning and they were advised by Mercedes to swap out some sort of heater unit. Hopefully this is the end of the issue after they get this new part installed.
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Picked the car up and all the issues have been resolved. I got a copy of the technical notes and I’ll post them below in case anyone else has a similar future in the issue.
Codes:P01892 Climate control: Electric heater booster A for the coolant has an electrical fault or open circuit.
B10BC11 PTC heater booster "High voltage" has a malfunction. There is a short circuit to ground.
B10BC49 PTC heater booster "High voltage" has a malfunction. There is an internal electrical fault.
Parts:
MB214-835-02-00 PTC Water Heater
Repair:
Removed front left wheel and fender liner to obtain access to PTC heater, powered down HV system, clamped coolant lines, replaced heater. Powered up HV with SDS. Bleed coolant circuit. Cleared codes.
Codes:P01892 Climate control: Electric heater booster A for the coolant has an electrical fault or open circuit.
B10BC11 PTC heater booster "High voltage" has a malfunction. There is a short circuit to ground.
B10BC49 PTC heater booster "High voltage" has a malfunction. There is an internal electrical fault.
Parts:
MB214-835-02-00 PTC Water Heater
Repair:
Removed front left wheel and fender liner to obtain access to PTC heater, powered down HV system, clamped coolant lines, replaced heater. Powered up HV with SDS. Bleed coolant circuit. Cleared codes.
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