2017 Mercedes-Benz C300 · symptom sheet
Check engine light or misfire
- 51owner reports
- 52,000median miles
- $2,000median quote
- 0involved a crash
Newest report Mar 20, 2026 · checked Oct 2, 2026
118 of the 216 complaints on this car are about the engine. 51 of those describe misfire, which makes it the most reported problem on the 2017 C300.
Tick what matches of 51 reports
Misfire on other C300 years
Report counts are for each model year on its own, so a newer car has had less time to collect them.
What this problem usually is
These reports start with the check engine light. Many describe the engine running rough or shaking at idle, a P0300-series code, or a catalytic converter code. A worrying number say the light was flashing. Owners often list ignition coils or spark plugs already replaced, and the light coming back afterward.
What got replaced
Few of these reports name the part that was replaced.
Recalls and investigations
3 recalls on the engine cover the 2017 model year. A recall on the same system isn't always the same failure, so read the defect text.
Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.
Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.
In the event that the engine or transmission cannot turn over, the starting current limiter may overheat from the repeated attempts of the starter motor attempting to start the vehicle.
All 15 recalls on the 2017 Mercedes-Benz C300, with the owner complaints on each recalled system
NHTSA investigations into the engine on the C300
C300 wrist-pin allegation. Closed feb 27, 2024.
Loss of rear lighting assembly. Closed may 12, 2014, led to recall 14V-177.
None of these investigations covers the 2017 model year.
What owners paid
6 of the 51 reports quote a price. Each dot is one quote. The middle half runs $1,740 to $2,500.
When it happens
The middle half of failures fell between 40,200 and 62,000 miles, from the 17 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 5 service bulletins or notices for the 2017 Mercedes-Benz C300 that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
Complaint Check engine light on with the following fault is current in the VGS Control Unit: P084300 Oil pressure sensor 'A' has a short circuit to positive stored in VGS control unit.
Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction Cause The partial-load ventilation valve (a part of ...
Complaint Check engine light on. One of the below fault codes is current in the engine control module (N3/10). P04DB29, P04DB31, P04DB79 Cause Open circuit or high resistance to crankcase vent line contact Remedy 1.
Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction The partial-load ventilation valve (a part of the intake line ...
1 more on the 2017 Mercedes-Benz C300 page.
What owners wrote
“Keep getting a code P052E! Changed the oil and code went away for a few days then came back. Looked into getting it fixed and it seems like Mercedes has known about this issue and hasnât called for a recall on this piece of equipment! Very costly to fix and says it needs to be replaced every 30k to 50k miles! At around 1k to 3k to fix everytime thatâs something they should recall”
Filed Aug 20, 2024 · 50,000 miles
“Car check engine light came on with only 62,000 miles. Diagnosed as code P052E, the issue is the positive crankcase ventilation valve being faulty. Regular oil changes and maintenance was done. I see multiple complaints with this issue, why is this not recalled? It is very expensive to have fixed.”
Filed Jul 10, 2024 · 62,000 miles
“The Crankcase Ventilator Actuator has malfunctioned, resulting in the Check Engine light showing up. The MB C300 4matic 2017 vehicle is at 40,200 miles as of [XXX]. Lot of other MB owners have reported same issues. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)”
Filed Sep 12, 2023 · 40,200 miles
“Code P052E costing me over $2500 to repair. Iâm not the only one dealing with this problem and my car only has 58k miles and itâs a 2017. Should be recalled considering the part being defective.”
Filed Mar 11, 2023 · 58,000 miles
Should you keep driving it?
This page can't tell you that. 0 of 51 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
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