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P052E Code Help ???

Old 01-08-2019, 08:40 PM
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Question P052E Code Help ???

Re: 2017 W213 E300 4Matic

Had check engine light come on today, of course about 5K after warranty expired. (55.4K). Car has been maintained by dealer, all services performed.
Pulled a "P052E" code with a generic reader which points to a PCV, PCM, Crankcase vent problem etc.
Can anybody point me toward any more information on where to start (component location, difficulty) ??
I changed the crankcase breather valve on my CLK years ago, but don't know where to start on this engine.
Thanks in advance!!

Last edited by captret; 01-08-2019 at 08:44 PM.
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Old 01-08-2019, 10:08 PM
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I found this via a Google Search and not likely what you're hoping to read:

P052E Mercedes-Benz Trouble Repair :If your P052E Mercedes-Benz check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system and engine control unit are in charge of monitoring a bunch of different, and if they get a reading that's a little out of whack, up pops the check engine light.
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Old 01-09-2019, 10:28 AM
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Depending on exactly what the failure is the Federal Emissions Warranty coverage is for 8 years/80,000 miles. States may have additional coverage.
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Old 01-09-2019, 02:56 PM
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Thanks ua549, that’s a great point!
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Old 01-09-2019, 04:00 PM
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Originally Posted by captret View Post
Re: 2017 W213 E300 4Matic

Had check engine light come on today, of course about 5K after warranty expired. (55.4K). Car has been maintained by dealer, all services performed.
Pulled a "P052E" code with a generic reader which points to a PCV, PCM, Crankcase vent problem etc.
Can anybody point me toward any more information on where to start (component location, difficulty) ??
I changed the crankcase breather valve on my CLK years ago, but don't know where to start on this engine.
Thanks in advance!!
isn't this the code set by "faulty gas cap"? Check that first. Remove/replace (tightly) and allow code to reset and clear itself. Worth a try before a trip to the dealer. Good luck.
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Old 01-10-2019, 03:32 PM
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Hi Cao... that was the first thing I checked. Funny, the CIL went out last night and then came back this morning. Will call dealer next time it shows.
Thanks, John
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Old 01-14-2019, 12:05 AM
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I am having this same exact code being shown on my 2015 c300 4matic. It has come and gone several times over the last few months. My warranty is just barely expired as well so I took the car into the dealership last week to find out if this problem would be covered under the federal emissions warranty. I was told that the crankcase vent valve would not be covered and that just about the only part that would fall under the emissions warranty is a catalytic converter . Sounded like bs to me so I opted to try and find a fix for it myself.

BTW sorry for the double post. I originally wrote this under a thread for GLC's.
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Jetfuture , Today 11:49 PM
Had this at about 32,000 miles. Covered under warranty. Would have been something like $1300 the dealer said. I was amazed at all of the major components they had to take out of the engine compartment to get to this part!
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snoopycoolsnoopycool , 05-10-2017 09:56 PM
Got a PE052E, anyone what is the cause of it?
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DBOC205DBOC205 , 05-10-2017 11:55 PM
Did you consider googling the code?
http://repairpal.com/OBD-II-Code-P05...ve-performance
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