Check Engine Code P052E
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2015 C 300 4MATIC
Check Engine Code P052E
Just got the dreaded check engine code P052E : Positive Crankcase Ventilation Regulator Valve Performance. My car just got out of warranty a few months ago. Could someone please provide a WIS guide and parts list? I'm aware this is a very difficult repair.
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Joined: Jan 2018
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2015 C 300 4MATIC
Part number to fix this issue: 274-090-17-29-80. I attached a PDF diagram illustrating where part is located.
Updated complete part list:
274-090-17-29-80 - Intake Line
020-997-78-45 - Air Pipe O-Ring
024-997-80-45 - Inter-Cooler Seal
Q-1-03-0005 - Mercedes-Benz OEM coolant. Color: Pink. G40
Updated complete part list:
274-090-17-29-80 - Intake Line
020-997-78-45 - Air Pipe O-Ring
024-997-80-45 - Inter-Cooler Seal
Q-1-03-0005 - Mercedes-Benz OEM coolant. Color: Pink. G40
Last edited by DoorHandle_LED; Apr 24, 2019 at 01:02 PM.
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2015 C 300 4MATIC
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2018 C 300
I had the same code a few weeks ago, the light came on and off every few days until I was able to get it into the dealer. luckily my car was still under warranty so it was fixed for free, not sure how much it would have costsout of warranty, the service advisor did say this is a common problem with 2015 C300's.
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Joined: Apr 2019
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C300 15
This happened with our 15 and the same code. The check engine light sporadically appeared and it felt like warmer weather solved the issue. Possible the extended warranty paid itself off in this case. I feel sorry for anyone paying this out of pocket because based on the dealer work sheet this was a labor intensive fix.
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2015 c300
This happened with our 15 and the same code. The check engine light sporadically appeared and it felt like warmer weather solved the issue. Possible the extended warranty paid itself off in this case. I feel sorry for anyone paying this out of pocket because based on the dealer work sheet this was a labor intensive fix.
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2015 c300
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From: NJ
2015 C300, 2008 C300(sold)
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2015 C300 4matic
I got a fantastic deal on a used 2015 C300 4matic this past August. - it only had 16,000 miles on it! I recently hit 32,000 miles (yes - I love this car and drive it a LOT) and I ended up with a P052E code. In my search for answers, I joined this forum and I found your posts for the PDFs which are very helpful. I'm planing on doing this fix myself and will likely tackle others in the future. Thank you for posting these PDFs - do you know if its possible and, if so, where I can get a copy of the full manual?
Thread Starter
Member
Joined: Jan 2018
Posts: 153
Likes: 33
2015 C 300 4MATIC
I got a fantastic deal on a used 2015 C300 4matic this past August. - it only had 16,000 miles on it! I recently hit 32,000 miles (yes - I love this car and drive it a LOT) and I ended up with a P052E code. In my search for answers, I joined this forum and I found your posts for the PDFs which are very helpful. I'm planing on doing this fix myself and will likely tackle others in the future. Thank you for posting these PDFs - do you know if its possible and, if so, where I can get a copy of the full manual?
Last edited by DoorHandle_LED; Apr 23, 2019 at 10:44 PM.
Junior Member
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From: NJ
2015 C300, 2008 C300(sold)
My light turned on and off 4 times the past month. The dealer said it's not an urgent fix and can wait til my next service. I'm trying to put it off since I'm out of warranty and they said it was around 1200 to fix because of 5 hours labor.
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From: Detroit area
2015 S550 Coupe; 2025 EQS 450 SUV
Same with my dealer. Bought a beautiful CPO 2016 with just under 39k miles on Saturday (one year of factory warranty remaining). CEL came on about two thirds into my 600-mile road trip home from buying the car. Dealer diagnosed P052E and told me there's nothing urgent unless the CEL starts blinking. They've scheduled me for next Monday (the next time loaners are available), but it still feels weird driving around with a CEL.
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2015 c300
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2015 C300 4Matic Sport
Better now than later i guess.
