The check engine light illuminated and the engine began running rough with misfires. Stored fault codes included P0301 and P0302 (cylinder 1 and cylinder 2 misfire detected) and P0315. An initial repair facility replaced spark plugs, ignition coils, the main battery and the auxiliary battery, which did not resolve the condition, and the vehicle was referred to an authorized Mercedes-Benz dealer. The Mercedes-Benz dealer performed an engine inspection and found compression of approximately 80 PSI caused by severely leaking intake and exhaust valves. The dealer determined the complete cylinder head requires replacement and estimated the repair at $7,545.72. The vehicle is currently not drivable and is available for inspection. This failure matches the condition described in Mercedes-Benz technical service bulletin LI01.30-P-072328, which identifies a leaking valve seat in the cylinder head on M260 and M264 engines and states the complete cylinder head must be replaced because valve seats cannot be reworked. Mercedes-Benz USA has issued an emission extended warranty covering the exhaust valve system on these vehicles, describing wear of the valve guide and seat ring due to increased lateral forces during operation, causing misfires on cylinders 1 through 4 and illumination of the check engine light. The vehicle is within the stated 15 year / 150,000 mile coverage limit, but the warranty claim was denied on the basis of maintenance history. The vehicle was serviced continuously,
2022 Mercedes-Benz CLA 250 4Matic
Routine
Owners filed 1 complaints about this vehicle with federal regulators, most often about the engine. No safety recall has been issued.
Most common 2022 Mercedes-Benz CLA 250 4Matic problems
1 of the 1 complaints (100%) are about the engine.
| Component | Reports | Crashes | Fires | Injuries | |
|---|---|---|---|---|---|
| Engine | 1 | 0 | 0 | 0 |
What owners reported
Newest filingsEngine
Filed Sep 17, 2026FL
All 1 complaints, reproduced as filed.
Across model years
Worst on record: 2022Reading this record
No unusual pattern of severe incidents in the complaint record.
Complaint counts track how many cars were sold and how long they have been on the road as much as they track quality. A common model from 2013 has had a decade to accumulate reports; a rare one from last year has not. The signal worth weighing is in the severity columns, in whether the same component keeps appearing, and in whether the manufacturer eventually opened a recall for it.
Most recent recall on file: none. Source: NHTSA Office of Defects Investigation.