Vehicles using OM608.915 engine list:

Engine OM608.915

Symptoms:
- Rough idling and loss of power during acceleration
- Excessive smoke from the exhaust, often black or blue
- Engine warning light illuminated on the dashboard
- Increased fuel consumption and poor throttle response
- Occasional stalling or difficulty starting the engine

Diagnosis:
- Check for clogged diesel particulate filter (DPF) causing backpressure
- Inspect the turbocharger for signs of wear or failure, including shaft play or oil leaks
- Test the fuel injection system for injector clogging or malfunction
- Scan the engine control unit (ECU) for fault codes related to sensors (e.g., MAF, MAP, EGR)
- Examine the EGR valve for carbon buildup restricting flow
- Verify the condition of the timing chain and tensioner for wear or elongation

Fixes:
- Perform a forced DPF regeneration or replace the DPF if severely clogged
- Repair or replace the turbocharger if damaged or leaking
- Clean or replace faulty fuel injectors to restore proper spray pattern and combustion
- Replace malfunctioning sensors to ensure accurate engine management
- Clean or replace the EGR valve to prevent exhaust gas recirculation issues
- Replace timing chain components if wear is detected to prevent engine timing problems
- Regular oil and filter changes using manufacturer-recommended specifications to maintain engine health

Prevention:
- Use high-quality diesel fuel and adhere to recommended service intervals
- Avoid frequent short trips that prevent the DPF from reaching regeneration temperature
- Regularly inspect and maintain the turbocharger and fuel system components
- Follow Mercedes-Benz guidelines for oil changes and use approved lubricants
- Monitor engine warning lights promptly and address issues early to prevent damage
- Keep the air intake system clean to avoid sensor contamination and airflow restrictions

By following these diagnostic steps and maintenance practices, owners of Mercedes Benz vehicles equipped with the OM608.915 engine can minimize common issues and ensure reliable performance.