1. Faulty Coolant Temperature Sensor:
- The coolant temperature sensor provides information about the engine's temperature to the Engine Control Unit (ECU).
- A faulty sensor might provide incorrect temperature readings, causing the ECU to mismanage fuel and air mixture, leading to stalling.
- Solution: Replace the coolant temperature sensor.
2. Clogged Fuel Injectors:
- Over time, fuel injectors can become clogged, affecting fuel delivery and causing hesitation or stalling.
- Solution: Have the fuel injectors professionally cleaned or replaced if necessary.
3. Ignition System Issues:
- Weak spark plugs, faulty ignition coils, or worn-out distributor cap and rotor can all lead to ignition problems, especially when the engine gets hot.
- Solution: Inspect and replace any faulty ignition components.
4. Vacuum Leaks:
- Vacuum leaks can disrupt the air-fuel mixture, causing stalling issues.
- Solution: Check for any cracks or loose hoses in the vacuum system and repair or replace as needed.
5. Fuel Pressure Regulator:
- A faulty fuel pressure regulator can cause fuel pressure fluctuations, affecting engine performance.
- Solution: Test and replace the fuel pressure regulator if found defective.
6. Faulty Oxygen Sensor:
- A faulty oxygen sensor can provide incorrect feedback to the ECU about the air-fuel mixture, leading to stalling issues.
- Solution: Inspect and replace the oxygen sensor if necessary.
7. Overheating Issues:
- Check the vehicle's coolant level, thermostat, and radiator fan's functionality. Overheating can cause the engine to cut off as a protective measure.
- Solution: Address any overheating issues by refilling coolant, replacing a faulty thermostat, or repairing the radiator fan.
Please remember that diagnosing complex car issues, particularly older models, can be challenging. Seeking assistance from a certified mechanic familiar with Mercedes vehicles is recommended, especially if you are not well-versed in automotive repairs.
