2017 Mercedes-Benz C300 Engine Problems
NHTSA component category: ENGINE · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How engine ranks on this vehicle
Share of the 214 complaints citing each category; one complaint can cite several. Full breakdown on the 2017 Mercedes-Benz C300 overview page.
What owners report
“In my family we have 2 mercedes benz cars one 2017GLC300 and other 2017 C300 4matic and both of the cars have the same issues…”NHTSA complaint 11504121 — filed 01/28/2023
“I purchased my 2017 C300 class Mercedes-Benz ("MB") in May 2021 from a used car dealership in Mobile, AL. At that time it had 36,000…”NHTSA complaint 11500998 — filed 01/10/2023
“Hey good morning. Thereâs been a been a system failure. P052E Positive Crankcase Ventilation Regulator Valve Performance. Warning message I got was the engine light…”NHTSA complaint 11500059 — filed 01/04/2023
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Engine complaints by year filed
Frequently asked questions
Does the 2017 Mercedes-Benz C300 have engine problems?
Engine is the most-reported problem area on the 2017 Mercedes-Benz C300: 76 of 214 complaints on file (35.5%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2017 Mercedes-Benz C300 have in total?
214 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 10 involved a crash, 3 involved a fire, 16 reported injuries, and none reported deaths.
What does NHTSA's engine category include?
NHTSA assigns each complaint to standard component categories; this page reports the ENGINE category exactly as NHTSA defines and records it.
