2016 Mercedes-Benz C-Class
Problems, recalls and owner-reported issues
Engine is the leading concern among 316 owner complaints filed for this model year. This is the 8th highest complaint count among 23 C-Class model years with reports.
Of the 2016 reports, 7 involved a crash and 5 involved a fire. 8 people were injured.
What owners report most often
Recalls and investigations
No safety recalls on file.
Representative owner complaints: engine
100 reports, newest first. Show all
Engine, Feb 22, 2024
M274 check engine light P052E71 Crankcase ventilation valve Topic: # LI 01.20-P-076794 crankcase ventilation cylinder head cover WIS-references document # AR01.20-P-9692MRU remove/install oil separator on crankcase.
Engine, Feb 20, 2024
Positive crankcase ventilation regulator valve performance
Electrical system, Other or unspecified, Engine, Feb 16, 2024
Crankcase Ventilation Valve Emission Modification -Error P052E71 -Error P06DA00
Engine, Feb 13, 2024
Error code PO52e crankcase ventilation
Engine, Jan 3, 2024
My coils are faulty and needing to be replaced, but not part of the existing recall for C63s coils. On the message forums for C63s I’ve come across a lot of owners that are having issues not being part of the recall. Campaign No. 2017060008.
Engine, Dec 2, 2023
Pcv valve broke and it emits all sorts of poisonous gases to the cabin!
Engine, Nov 1, 2023
Mercedes C300 4Matic Engine light off. The diagnostic tool showed P052E error, which seems like a common problem with MB C300 models built from 2015. Is there a manufacturer recall for this issue? This warning came a few weeks ago and disappeared by itself shortly. It came again.
Engine, Oct 5, 2023
Engine code P052E has come on at 60k miles. After researching the problems this is a very common problem with the 2016 c300 that mercedes refuses to address. To add insult to injury the part needed to be replaced is a sensor worth 100 dollars but mercedes charges over $2500 because you need specialty tools to get to it. This is a very common problem with owners around 40-80k miles and has no cause other than faulty parts on Mercedes end.
Engine, Oct 1, 2023
My mercedes c300 Check engine light came on for P052e positive crankcase ventilation and after doing research, this sounds like a common problem for this car / model
Electrical system, Engine, Sep 22, 2023
Had an oil change at a Mercedes dealership after driving for a couple hours. Check engine was on for a code P052E, being crankcase ventilation system. Had the car diagnosed, cost to repair 1,600 dollars. Went through with repair, the code pop up again (P052E). Having to bring vehicle constantly to Mercedes dealerships.
Engine, Sep 21, 2023
P052E - PCV Regulator Valve Performance: Actuator Stuck P06DA - Engine Oil Pressure Control Circuit/Open no sub type information My understanding is these are common issues and Mercedes and anyone who works on them know it is a common issue for all lines. I also have a broken sunroof that seems to be common on all lines. There are some recalls out for the sunroof but not for the C-Class C300, although all of the videos I have found match the same issues that were recalled on other models. The dealer confirmed these are known issues.
Engine, Fuel/propulsion system, Sep 19, 2023
Engine light on smells gas constantly tried to change oil that did not work light came back on
Engine, Sep 7, 2023
CRANKCASE VENTILATION- code: P052E came up and I had just bought from the dealership with 87k miles
Engine, Jul 18, 2023
PVC valve replacement Engine light off and on Started about 3 months ago
Engine, Jun 12, 2023
I have a problem that happened with a trouble code: P052E. It appears for now reason so the problem is in a faulty positive crankcase ventilation regulator valve. It costs a lot and not all the mechanics can do this type of work.
Electrical system, Engine, Fuel/propulsion system, Jun 9, 2023
Engine misfire, rough idle, shake when come to red light stop, burnt smell inside cabin, loss of power
Engine, Fuel/propulsion system, Jun 1, 2023
Check engine light P052E, PVC valve. Dealer wants $2,500 for this repair and people are complaining that around 30k-50k it does it. Thats ridiculous. My dealer said its a common issue but Mercedes is not issuing a recall.
Engine, May 6, 2023
The PCV Valve/crankcase has broken 3 times on this car with different repairs and parts. This is happening very commonly to these cars and may cause significant safety issues. The code is P052E
Engine, Fuel/propulsion system, May 3, 2023
My car failed smog test due to code P052e positive crankcase ventilation regularly valve. Upon some research, I found that this is very common issue with this car. The repair costs +$2000 before tax at the dealership. Please consider this complain as this issue is very common with this make model and unfortunately many drivers don’t realize that it’s due to faulty system.
Engine, May 3, 2023
my engine light came on. When I took the car to get diagnosticated message P052E showed.
Engine, Apr 1, 2023
PCV Valve causing contamination and shortening the life of the engine oil.
Engine, Mar 31, 2023
Check engine light keeps coming on and off.
Power train, Engine, Feb 21, 2023
I bought the car with 51k miles . Engine failed at 71k miles , due to piston #1 cracking . Almost caused me to get rear ended on a busy street . I went to the dealership and they charged me $10250 to replace the engine with a remanned long block and they offered a 2 year warranty. 9 months, only 19k miles on “new motor” the “new” engine fails again … same reason piston # 1 cracked failed suddenly on the highway and I had to push the car to safety to the emergency lane while cars where coming.. I went back to dealer demanding a replacement and told them this is a common occurrence and they refused to help me . I called corporate. They refused to help me saying I would have to purchase an engine for the second time out of pocket when it only lasted 9 months. This is a big fault in the m274 engine … it’s also a safety hazard that can cause serious injury, fire , or even a deadly accident. I read that it’s a common issue with these engines.
Electrical system, Engine, Fuel/propulsion system, Feb 16, 2023
Check engine light appeared this morning, had the code scanned and found it to be P052E. This code is in reference to the Positive Crankcase Ventilation valve, which is responsible for routing excessive crankcase gases. After extensive research online, it would seem this is a known issue for Mercedes once they reach 50,000 miles, right outside of warranty. This is a very costly fix due to it being labor intensive. This should be a recall as it is a known mechanical issue, and even the dealers echo the same.
Engine, Feb 14, 2023
I made 2 engine stalling complaints at the dealership in 2021/2022.. the dealership kept my vehicle for 2 days and said nothing was wrong. My vehicle recently in stalled in drive gear, I had to cut the car off & turn it back on