Contents: Removal ↡ Installation ↡
The 6-cylinder engines have a dual exhaust system with dual sections. However, the procedure is the same as for a conventional system. To replace individual components and parts, follow the instructions in the relevant sections. Make sure you have new fasteners, as well as a supply of rubber mounts and gaskets. When installing system components, pay attention to the tightness of the connections.
Removal
1. Raise the vehicle and support it securely on supports.
2. Wet the bolts and nuts of the exhaust system with a special rust remover.
3. Remove the engine and gearbox casing from below.
4. Disconnect the oxygen concentration sensor connector.
5. Disconnect the inlet pipe from the exhaust manifold.
Note: Have an assistant support the exhaust system.
Fig. 5.56. Removing the exhaust system: 1 – nut
Information copied from the website: www.mercedesman.ru
Unscrew nuts 1 (Fig. 5.56) of the front exhaust pipe mounting bracket and remove the threaded plate.
6. Remove the rubber suspension components and lower the exhaust system assembly to the floor.
Installation
7. Check the technical condition of all parts of the exhaust system.
8. Clean the connections from corrosion and carbon deposits.
Caution! Install only new seals, bolts, nuts. To facilitate removal of the system, lubricate the fastening parts with copper paste LIQUI MOLI LM0–508-ASC. Do not allow the paste to get into the inlet pipe in front of the catalytic converter.
9. Install the exhaust system on the car and secure it with nuts (without delay) flange of the inlet pipe to the exhaust manifold.
10. Connect the exhaust system to the body with rubber suspension parts. The distance between the exhaust system parts and the body parts should be within 25 mm.
Fig. 5.57. Fastening the exhaust system to the bracket: 1 – nut
11. Install the threaded plate of the intake pipe and tighten the new nuts 1 (Fig. 5.57) to the bracket with a torque of 20 N·m.
Connect the oxygen concentration sensor connector.
12. Install the lower engine compartment shield.
13. Start the engine and check the exhaust system for leaks.
Attention! Disposal of the catalytic converter. Used catalytic converters contain precious metals that can be used in the future. Mercedes-Benz service centers accept used catalytic converters in exchange for new ones with an additional payment.
Warning! Do not open the catalytic converter housing, as it contains highly toxic substances.