Vehicles using M264.920 engine list:

Engine M264.920

Symptoms:
- Rough idling or engine misfire
- Loss of power or hesitation during acceleration
- Check Engine Light (CEL) illumination
- Increased oil consumption or oil leaks
- Unusual noises from the timing chain area

Diagnosis:
- Use an OBD-II scanner to read fault codes related to ignition coils, fuel injectors, or camshaft timing
- Inspect ignition coils and spark plugs for wear or damage
- Check for oil leaks around the valve cover gasket and timing chain cover
- Perform a compression test to assess cylinder health
- Examine timing chain tensioner and guides for wear or failure

Fixes:
- Replace faulty ignition coils or spark plugs to resolve misfires and rough running
- Repair or replace leaking valve cover gaskets to prevent oil loss and contamination
- Replace worn timing chain tensioners and guides to avoid timing issues and engine noise
- Clean or replace fuel injectors if clogged or malfunctioning
- Regular oil changes with manufacturer-recommended oil to maintain engine lubrication and prevent sludge buildup

Prevention:
- Adhere strictly to Mercedes-Benz recommended maintenance intervals, especially oil and filter changes
- Use high-quality synthetic oil to ensure proper lubrication and reduce wear
- Monitor engine performance and address any warning lights promptly
- Avoid prolonged idling and aggressive driving to reduce stress on engine components
- Schedule periodic inspections of ignition and timing components to catch early wear signs

By following these diagnostic steps and maintenance practices, owners of vehicles equipped with the M264.920 engine can minimize common issues and ensure reliable performance across models such as the CLS 350, E 300, E 200, and GLE 350.