Remove / install catalytic converter and front exhaust system - AR49.10-P-5531E

ENGINE 119.97 /981 /982 

Fig 1: Identifying Catalytic Converter And Front Exhaust System Remove/Install Components - Engine 119.97

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Catalytic Converter And Front Exhaust System Remove/Install Components - Engine 119.981 /982

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
1	Remove / install lower engine compartment covering
2	Remove / install exhaust system as from flange connection	Model 124.03	AR49.10-P-7280EA
		Model 129	AR49.10-P-7280FA
		Model 140	AR49.10-P-7280FB
3	Disconnect O2 sensor connectors (G3/2x1 or G3/3x1, G3/4x1)
4	Unscrew bolts (1) on catalytic converter / exhaust manifold flange connection	If bolts are sluggish, or thread damaged: ↓
		Replace rivet nuts in exhaust manifold.	AR49.10-P-5531-01DA
			*BA14.10-P-1002-01B
5	Loosen flanged connections at cross tube (4)		*BA49.10-P-1003-01A
6	Unscrew nuts (6a) on carrier (10) and remove three-way catalytic converter (2)
	Three-way catalytic converter coating modified	Engine 119.97	BT49.10-P-0001-01A
7	Unscrew bolts (1) on transverse pipe / exhaust manifold flange connection		*BA14.10-P-1002-01B
8	Unscrew O2 sensors (G3/2 or G3/3, G3/4)	Installation  : Coat thread on oxygen sensor with heat-resistant lubricant	*BR00.45-Z-1005-06A
			*BA14.00-P-1001-01A
			Fig 3
	Checking
9	Check flanges and center sealing (5) for reusability	Replace, if necessary.
10	Install in the reverse order

EXHAUST MANIFOLD

Number	Designation		Engine 119
BA14.10-P-1002-01B	Flange connection, exhaust manifold and front exhaust pipes	Nm	20

O2 SENSOR

Number	Designation		Engine 104, 111, 119, 120, 137, engine 166 in model 168
BA14.00-P-1001-01A	O2 sensor on exhaust pipe/ exhaust manifold	Nm	55

EXHAUST SYSTEM

Number	Designation		Engine 119
BA49.10-P-1003-01A	Bolt, flange connection to crosspipe / exhaust system	Nm	25

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1005-06A	Paste	A 000 989 76 51

Fig 3: Identifying Box Wrench Bit, Delco R4 And A6 (000 589 71 03 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Cocking Bolt (103 589 01 39 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.