Vehicles using M276.823 engine list:

Engine M276.823

Symptoms:
- Rough idling and misfires
- Loss of power or hesitation during acceleration
- Excessive oil consumption or oil leaks
- Check Engine Light (CEL) illumination with related fault codes
- Unusual noises such as ticking or knocking from the engine bay

Diagnosis:
- Perform a thorough visual inspection for oil leaks around valve covers, camshaft adjusters, and turbocharger seals
- Use diagnostic tools to read fault codes, focusing on ignition coils, fuel injectors, and camshaft timing errors
- Conduct a compression test to check cylinder health and detect potential valve or piston issues
- Inspect the intake manifold and turbocharger for carbon buildup or damage
- Check the condition of spark plugs and ignition coils, as these are common wear items

Fixes:
- Replace faulty ignition coils and spark plugs to resolve misfires and rough running
- Repair or replace leaking valve cover gaskets and turbocharger seals to stop oil leaks
- Clean or replace the intake manifold and turbocharger components if carbon buildup is detected
- Update engine software to the latest version to improve fuel mapping and camshaft timing control
- Address any mechanical issues found during compression testing, such as valve repairs or piston replacement, if necessary

Prevention:
- Follow the manufacturer’s recommended oil change intervals using high-quality synthetic oil to reduce sludge and wear
- Use OEM or approved replacement parts for ignition and fuel system components
- Regularly inspect and maintain the turbocharger and intake system to prevent carbon buildup
- Keep up with software updates from Mercedes-Benz to ensure optimal engine management
- Avoid prolonged idling and aggressive driving to reduce stress on engine components and prolong their lifespan