Muffler: Service and Repair

Removing and installing rear mufflers

Warning!
- Danger of burns! Parts of the exhaust system can be extremely hot.
- Do not carry out the work until the exhaust system has cooled down or wear suitable protective gloves!




1 Muffler.
2 Fastening clamp for tailpipe.
3 Tailpipe.
4 Clamping sleeve.

Removing muffler

Note! In order to avoid damage to the wheel, use the prescribed special tool (socket wrench insert) P300 to loosen and unscrew the wheel bolts.

1. Remove the rear wheel. To do this, unscrew and remove the wheel bolts.




2. Remove tailpipe. To do this, unscrew the hexagon nut of the fastening clamp, spread the clamp and completely remove tailpipe.




3. Undo clamping sleeve to the catalytic converter. To do this, undo the two hexagon nuts and push the clamping sleeve toward the catalytic converter (if corroded, treat with penetrating oil or heat). Then pull off the sleeve.




4. Remove muffler. To do this, unscrew the three M8 hexagon-head bolts and lift out the muffler toward the wheel hub. Suitable tool: commercially available 3/8 inch ratchet wrench with long extension, joint and socket wrench insert (a/f 13).




Screw connection points for the muffler

Installing muffler

Note! Replace clamping sleeve. Apply a light coating of high temperature grease on the sleeve before installation to facilitate fitting.

1. Fit new clamping sleeve. To do this, slide the clamping sleeve onto the catalytic-converter pipe.




2. Insert the muffler into the vehicle from the wheel side and move it to installation position. Then fit the three hexagon nuts on the screw connection points of the holder -arrows- and tighten only slightly.




3. Slide the clamping sleeve over the muffler pipe and move it to installation position. Screw down both hexagon nuts and tighten with the prescribed torque.
- Tightening torque for hexagon nuts of the clamping sleeve: 46 Nm (34 ftlb.)

4. Tighten the three muffler fastening screws with the prescribed torque.
- Tightening torque for the MB hexagon-head bolts on the muffler holder: 23 Nm (11 ftlb.)

Note! Replace fastening clamp for tailpipe.

5. Fit tailpipe. To do this, put the new fastening clamp (in the new installation position) -illustration below- with tailpipe onto the connecting pipe to the muffler. Slightly tighten the M8 hexagon nut with a commercially available long 3/8-inch socket wrench insert (a/f 16).

Installation position and tool for tailpipe fastening clamp




6. Align tailpipe. To do this, position the tailpipe with respect to the rear spoiler. Service and Repair




7. Tighten hexagon nut of the tailpipe fastening clamp with the prescribed torque.
- Tightening torque for fastening nut (a/f 16): 30 Nm (22 ftlb.)

Note! In order to avoid damage to the wheel, use the prescribed special tool (socket wrench insert) P300 to tighten the wheel bolts.

8. Mount the wheel again Refer to No.44, Mounting wheel on vehicle.