2015 Mercedes GLA 250: Cheap repair for Fault Code P052E Crankcase Vent Valve P0597 Thermostat

Before you attempt to splice in the new vent valve, be sure to check with your Mercedes dealer as apparently there is a new addendum to the warranty that will cover this problem for 15 years on US models.
That being said, this is a much cheaper DIY repair for the dreaded P052E Crankcase Vent Valve check engine fault code compared to taking it to the dealership or replacing the entire part that Mercedes says to replace if it is out of warranty. You can buy just the vent valve and splice it into the expensive part Mercedes says must be replaced. It is also much, much easier to do this job. I also tackle a P0597 error code by replacing the thermostat and housing. On the GLA models, if your thermostat has never been replaced, you should replace the thermostat if you are going to replace the crankcase vent valve since 95% of the labor is part of changing the vent valve. Plus, the thermostat and housing (sold only as one unit) is about a $60 part, so do yourself a favor and replace both at the same time.

[@georgefitter7656]

My 2015 C300 4Matic gave the same P052E code so I took it to my dealer in New Jersey. Service manager said that Mercedes Benz extended the warranty till 2029 to repair the issue. He said the part is back ordered but I’m on the list.

[@jt-yf1kv]

Said the same for me smh been waiting for two months.

[@lixiaoyu1067]

been waiting for 3 months... wonder if you guys got it fixed?

[@kevingan561]

hey where you located i would love for you to work on my gla too

[@DJ170]

What the plug do on the PCV Vavle ? Heated or it is a motor ?

[@grzegorzwadny5104]

Hi Problem solved? Regards

[@akuamcilwain4579]

I need mine replaced on a 2018 GLA 250. Any of you do this work? I’ll travel reasonably but I live in Michigan.

[@osami_-9641]

I can do it I live in Windsor but I can come to Michigan and do it for you

[@Alpha_kicks]

Were you able to fix it ? I started getting that code since last week

[@akuamcilwain4579]

No I haven’t gotten it fixed yet. The person above stated they could fix it but they live in Canada so I don’t know if they have a shop or how much it would be.

[@Alpha_kicks]

You still driving with the light on ? I hope it’s not getting worse

[@akuamcilwain4579]

@@Alpha_kicksyes…it only affects your emissions. BUT I was told that if something does go wrong with the engine you will not know because the light is on and you’re thinking it’s just the valve issue.

[@powayimports4175]

Mercedes has extended the whole repair for 15 years 150,000 miles. Save yourself the headache.

[@badboy17pt]

In what country

[@akuamcilwain4579]

And this is not for the Gia 250. They are not offering the extended warrant for that car right?

[@Alpha_kicks]

@@akuamcilwain4579 yep it’s the same issue with other ones but they are covered but GLA250 is not

[@mistyday]

I had to replace my air intake