Models with M51 engine
1. Remove the crankcase protection panel and support the exhaust system assembly.
2. Give fixture of the holder of the catalytic converter.
3. Give nuts and disconnect an exhaust pipe from a turbocharger.
When installing, replace the nuts and lubricate the threads with CRC copper paste.
4. Give hex nuts and turn out bolts with a six-sided head, remove a collar of fastening of a reception pipe.
When installing, align the exhaust pipe clamp after the complete installation of the exhaust system so that the system components are not stressed.
5. Give nuts and remove system of release OG in gathering.
6. Installation is carried out in the reverse order.
Models with M52, M60, M62 engines
1. If necessary, remove the rear crankcase guard and heat shield on the front axle beam.
2. Disconnect the rear fastening elements of the catalytic converters from the body (see illustration).
3. Support the exhaust system.
4. On models with engines M60 and M62 disconnect the connectors of the left and right lambda probes (see Section Removal and installation of lambda probes). Release the electrical wiring from the clamps.
5. On models with engines M60 and M62 Disconnect the exhaust system from the exhaust manifolds.
When installing, replace the O-ring.
6. On models with an engine M52 Turn out bolts and nuts of fastening of a flange.
During installation, check and, if necessary, replace the gaskets. Replace nuts and lubricate threads with CRC copper paste.
7. On models with engines M60 and M62 Give nuts of rubber-metal hinges of fastening of the additional muffler (behind the main) on the rear axle beam.
8. On models with an engine M52 Give nuts of rubber-metal hinges of fastening of the additional muffler (behind the main) on the rear axle beam.
9. On models with an engine M60 Give nuts of clips of fastening of the additional muffler (behind the main) from left and right sides. Remove the complete exhaust system.
10. On models with an engine M52 give nuts of rubber-metal hinges on the additional muffler (behind the main) on the left and on the right side. Remove the complete exhaust system.
11. Installation is carried out in the reverse order. On models with engines M60 and M62 preliminarily shift the rubber-metal hinge in the direction of the car movement by a distance A = 15 mm.
Models with M52TU engine
1. Loosen the nuts on the flanges and separate the pipes. Check the condition of the gaskets and replace if necessary.
When installing, replace the nuts, lubricate the threads with CRC copper paste.
2. Remove the bolt (1) and remove the intake pipe bracket.
When installing, align the front exhaust pipe clamp without tension after the complete installation of the exhaust system. To do this, loosen the bolts (2).
3. Support the exhaust system and secure it against falling.
4. Turn out bolts (1 and 2) with a hexagon head and remove the spacer (3). The front intermediate piece is connected to the exhaust system via a rubber-to-metal joint.
5. Give nuts of the forward hinge on the back additional muffler.
6. Give nuts of the back hinge on the back additional muffler and remove system of release OG in gathering.
7. Installation is carried out in the reverse order.
Models with M57 engine
1. Support the exhaust system and secure it against falling.
2. Give nuts (1) and remove the exhaust pipe (2) moving backward.
3. Turn out bolts (1) and remove the bracket (2).
4. Give the fasteners of the retaining plate (see illustration).
5. Remove the rubber rings on both additional mufflers and remove the exhaust system.
6. Installation is carried out in the reverse order.
Models with M57 and M67 engines
1. Support the exhaust system and secure it against falling.
2. On models with an engine M57 give nuts (1) and remove the exhaust pipe (2) moving backward.
3. On models with an engine M57 remove the bolts (1) and remove the bracket (2).
4. On models with an engine M67 remove the bolts (1 and 2) and remove the retaining clip.
5. Give the fasteners of the retaining plate (see illustration).
6. Remove the rubber hangers on both additional mufflers and remove the exhaust system.
7. Installation is carried out in the reverse order.
Models with M73 engine
1. On models until 09.1998 issue. (without electronic catalytic converter) disconnect the connectors of the left and right lambda probes and release their electrical wiring. Skip to paragraph 6.
2. On models since 09.1998 issue. (with electronic catalytic converter) remove the bolt (1), give the nut (2) and remove the cover (3).
Paragraphs with 3 to 5 refer to models from 09.1998 issue.
3. Release the holder and release the connector (1). Disconnect the wiring connectors of the right lambda probe and the positive wires of the electronic catalytic converter. Remove the cover of the electrical wiring connector of the left lambda probe and disconnect the connector. Give the nut (2) negative wire attachment (3) to the body.
4. Give the nut (1) fastening the negative wire to the electronic catalytic converter.
The tips of the positive and negative wires are cone-shaped, use a special puller to remove them (tool no. 18 0 050). When installing, use new nuts.
5. Due to the risk of breaking the ceramic insulation, disconnect the positive wire from the electronic catalytic converter only in exceptional cases, for example, if the wiring is damaged.
Do not touch the positive wire at the connection points.
6. Disconnect the rear underbody protection panel and heat shield from the front axle beam.
7. Disconnect the rear fastening elements of the catalytic converters from the body (see illustration).
8. Support the exhaust system and secure it against falling.
9. Disconnect the exhaust system from the exhaust pipes (see illustration).
10. Disconnect the left and right rubber-metal hinges of the rear additional muffler to the rear axle beam (see illustration).
11. Give nuts of clips of fastening of the back additional muffler from the left and right sides (see illustration).
12. Remove system of release OG in gathering.
13. Installation is carried out in the reverse order. Preliminarily shift the rubber-metal hinge in the direction of the car movement by a distance A = 15 mm (see illustration).
14. On models from 09.1998, issue. (with electronic catalytic converter) after installation, use the diagnostic tool to activate the electronic catalytic converter and carry out a test.