Checking the condition of the exhaust system (Mercedes-Benz C-Class W203)

1. The check should be done with a cold engine, so it is best to do it before the first trip of the day or no earlier than three hours after turning off the engine. Check the condition of the entire exhaust system, starting from the engine and ending with the end of the exhaust pipe. Ideally, this check should be done with the car lifted on a winch, when there is free access to it from below. If a winch is not available, jack up the car and securely place it on supports.

2. Diesel engine: Remove the engine lower cover, refer to Section Checking the engine with a vacuum gauge.

3. Check pipes and pipe connections for signs of leaks, severe corrosion and damage. Check the condition and reliability of all brackets and hangers of the system.



4. At the same time, inspect the underbody of the car for holes, corrosion, loose seams, and other defects that could allow exhaust gases to enter the car's interior. Seal all openings with a suitable sealant.

5. Shine a light on the exhaust system and inspect it for holes, rust, and chafing.

6. If there are severe dents, replace the exhaust pipes.

Article based on data from the website: MercedesMan.ru





7. Check all rubber holders for cracks by turning and rotating them and replace if necessary. The accompanying illustration shows the rubber holders (1) and (2) of the main muffler (3).

8. Petrol engine: Check the electrical connections and the reliability of the lambda probe fastening.

9. Diesel engine: Install the engine lower cover, refer to Section Checking the engine with a vacuum gauge.

10. Inspection of the inner surface of the exhaust pipe allows you to determine the current operating condition of the engine. The composition of the deposits in the pipe indicates the quality of the engine settings. If the pipe is black and sooty on the inside, this may indicate that it is necessary to thoroughly check the fuel system.

11. Lower the car onto its wheels.