Removing/installing the complete exhaust system · ar4910p7000pr · Mercedes-Benz WIS

AR49.10-P-7000PR

Removing/installing the complete exhaust system

21.3.00

ENGINE 111.951 in MODEL 203.035 /235 /735

ENGINE 111.955 in MODEL 203.045 /245 /745

ENGINE 111.981 in MODEL 203.747

P49.10-2152-09

1 Shield

2 Left floor cover

3 Front exhaust system

4 Bolts

5 Nuts

6 Bracket

7 Thread plate

8 Rubber mount

9 Bracket

G3/1 O2 sensor downstream TWC [KAT]

G3/2 O2 sensor upstream CAT

G3/1x1 Connector of O2 sensor downstream TWC

G3/2x1 Connector of O2 sensor upstream TWC

 	Remove/Install
1	Remove engine compartment paneling		AR61.20-P-1105P
2	Detach connector of O2 sensor upstream TWC (G3/2x1)
3	Remove shield (1) above the catalytic converter	 To do this, press the electrical line of O2 sensor downstream TWC (G3/1) out of the bracket.
4	Partly loosen the left floor cover (2)
5	Disconnect O2 sensor downstream TWC [KAT] connector (G3/1x1)	 To do this, pull left floor cover (2) down a little way.
6	Unscrew front exhaust system (3) from exhaust manifold	 Installation: Replace bolts (4).
		 Inspect the rivet bushes in exhaust manifold, replace if necessary. See 
		Replace rivet bushes in exhaust manifold	AR49.10-P-5531-01DA
		 Bolt of flange connection to exhaust pipes or exhaust manifold	*BA49.10-P-1005-01F
7	Support the exhaust system.
8	Unscrew the nuts (5) on bracket (6)	 Installation: Replace thread plate (7) and nuts (5).
		 Self-locking nuts on front exhaust pipe	*BA49.10-P-1004-01F
9	Remove bracket (9) for the exhaust system on the underbody	 Bolt of exhaust system to underbody	*BA49.10-P-1006-01F
10	Remove the complete exhaust system	 Installation: Check rubber mount (8) and bracket (9), replace if necessary. Install exhaust system free of tension.
	Notes on disposing of catalytic converters	For vehicles with catalytic converter technology code (620a)	OS49.10-P-1000-01A
11	Install in the reverse order

 Exhaust system

Number	Designation		Engine 111 in model 203


BA49.10-P-1004-01F	Self-locking nut to front exhaust pipe	Nm	20
BA49.10-P-1005-01F	Bolt of flange connection to exhaust pipes or exhaust manifold	Nm	20
BA49.10-P-1006-01F	Bolt of exhaust system to underbody	Nm	20