Exhaust System Overview

Exhaust System Overview

• The coupling element in the front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.

• Replace gaskets and self-locking nuts.

• After exhaust system repairs, make sure the exhaust system is not under stress and is far enough from the body. If necessary, loosen the clamping sleeve and align the muffler and exhaust pipe so that there is adequate distance to the body and that weight is evenly distributed among the suspended mounts.

• The exhaust manifold and turbocharger are one component. For information on removing and installing, refer to => [ Turbocharger ] Turbocharger.






1 Bolt

• 25 Nm

2 Suspended Mount

• Replace if damaged.

3 Gasket

• Always replace.

4 Nut

• 40 Nm

• Always replace.

• Coat the stud bolts on the exhaust manifold with hot bolt paste (G 052 112 A3).

5 Heated Oxygen Sensor (G39)

• 55 Nm

• Bank 1, sensor 1.

• The threads of new oxygen sensors are already coated with hot bolt paste.

• When reusing the old oxygen sensor, grease only the threads with hot bolt paste (G 052 112 A3) , the paste must not get into the slots in the oxygen sensor body.

6 Front Exhaust Pipe with Catalytic Converter

Danger of causing damage to the coupling element.

• Do not bend the coupling element more than 10°.

• Do not stretch the coupling element.

• Do not damage the wire mesh on the coupling element.

• Protect the catalytic converter from shocks and impact stress.

• Removing and installing, refer to => [ Front Exhaust Pipe with Catalytic Converter ] Service and Repair.

• Align the exhaust system free of tension. Refer to => [ Exhaust System, Aligning ] Procedures.

7 Oxygen Sensor after Three Way Catalytic Converter (G130)

• 55 Nm

• Bank 1, sensor 2.

• The threads of new oxygen sensors are already coated with hot bolt paste.

• When reusing the old oxygen sensor, grease only the threads with hot bolt paste (G 052 112 A3) , the paste must not get into the slots in the oxygen sensor body.

8 Front Clamping Sleeve

• Tighten the nuts evenly. Refer to => [ Tightening Torque and Installed Dimension of the Clamping Sleeve ] Installed Position and Tightening Torque of the Clamping Sleeve.

9 Nut

• Tighten evenly. Refer to => [ Tightening Torque and Installed Dimension of the Clamping Sleeve ] Installed Position and Tightening Torque of the Clamping Sleeve.

10 Bracket

11 Bolt

• 25 Nm

12 Suspended Mount

13 Suspended Mount

14 Exhaust Pipe with Center and Rear Mufflers

• Original equipment as one unit with the rear muffler. For repairs, replace each separately.

15 Tunnel Brace

16 Nut

• 25 Nm

17 Bolt

• 25 Nm

18 Suspended Mount

19 Bolt

• 20 Nm

20 Bracket

21 Bracket

22 Bolt

• 25 Nm