Remove/install catalytic converter - AR49.10-P-5500M

ENGINE 275.950 in MODEL 215.376, 220.176 

ENGINE 275.980 in MODEL 215.379, 220.179 

Fig 1: Identifying Charge Air Cooler, Hose Clamp, Catalytic Converter And Turbocharger

Fig 2: Identifying Flanged Connection, Sealing Ring, Heat Shield And Transmission Oil Pan

	Remove/Install
	Risk of death  cased by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the hydraulic hoist and position the four support plates below the hoist support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury  to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of injury  to fingers being jammed or pinched  when Remove/install or aligning hoods, doors, trunk lid/tailgate or sliding roof.	When moving components, ensure that no body parts or limbs are within the operating range of moving parts.	AS00.00-Z-0011-01A
	Notes on self-locking nuts and bolts	All models	AH00.00-N-0001-01A
1	Open engine hood and move to upright position	After closing the engine hood check the locking function, for this step pull engine hood jerkily to the top.	AR88.40-P-1000M
2	Remove engine trim panel	Engine 275.950 in Model 215.376, 220.176	AR01.10-P-2405LA
		Engine 275.980 in Model 215.379, 220.179 with AMG vehicles, code 990	AR01.10-P-2405IM
	Right three-way catalytic converter
3	Unplug right O2 sensor upstream TWC [KAT] connector (G3/4x1)	Unclip connector at charge air cooler (2), feed line of O2sensor from retaining clamp.
4	Remove bottom engine compartment paneling	Center and rear section.	AR61.20-P-1105M
5	Disconnect connector of right O2sensor upstream of TWC (G3/6x1)	Unclip connector at transmission oil pan (11), feed line of O2sensor from retaining clamp.
6	Remove heat shield (13)	Under right catalytic converter.
7	Unscrew from below bolts (3) of hose clamp (4) to turbocharger (6)	Installation:  Observe installation position of hose clamp (4). The hose clamp (4) is fixed through the cutout with the lug at the turbocharger (6)
			*BA49.10-P-1002-01L
8	Dismount bolt of catalytic converter bracket (10) at right transmission		*BA49.10-P-1008-01L
9	Separate flange connection (7)		*BA49.10-P-1002-01G
10	Unscrew nuts at catalytic converter bracket (12)	Installation:  Replace nuts (2 pieces).
11	Lift out catalytic converter (5)	Removal:  When unscrewing the catalytic converter, turn slightly to the engine side. At the same time ensure, that the O2sensors are not damaged. Installation:  Use emery cloth to remove combustion and corrosion residues at connection points.
	Notes on disposing of catalytic converters	all	OS49.10-P-1000-01A
	Left catalytic converter
12	Disconnect connector of left O2sensor upstream of TWC (G3/3x1)	Unclip connector at charge air cooler (2), feed line of O2sensor from retaining clamp.
13	Remove bottom engine compartment paneling	Center and rear section.	AR61.20-P-1105M
14	Disconnect connector of left O2sensor downstream of TWC (G3/5x1)	Unclip connector at transmission oil pan (11), feed line of O2sensor from retaining clamp.
15	Remove steering coupling
		Model 215.376, 220.176 with Engine 275.980	AR46.10-P-8000I
16	Unscrew from below bolts (3) of hose clamp (4) to turbocharger (6)	Installation:  Observe installation position of hose clamp (4). The hose clamp (4) is fixed through the cutout with the lug at the turbocharger (6)
			*BA49.10-P-1002-01L
17	Dismount bolt of catalytic converter bracket (10) at left transmission		*BA49.10-P-1008-01L
18	Separate flange connection (7) and flange connection (8)	Installation:  Check sealing ring (9a) and sealing ring (9b) for wear, replace if required.
			*BA49.10-P-1002-01G
19	Detach exhaust rubbers at the rear axle	Detach on the exhaust side.
20	Feed through rear exhaust system to vehicle rear, until flange connection (7) and flange connection (8) is unobstructed
21	Unscrew nuts at catalytic converter bracket (12)	Installation:  Replace nuts (2 pieces).
22	Lift out catalytic converter (5)	Removal:  When unscrewing the catalytic converter, turn slightly to the engine side. At the same time ensure, that the O2sensors are not damaged. Installation:  Use emery cloth to remove combustion and corrosion residues at connection points.
	Notes on disposing of catalytic converters	all	OS49.10-P-1000-01A
23	Install in the reverse order
24	Inspect installation position and clearance of exhaust system	The exhaust system must be installed free of stress, if necessary: ↓ Align exhaust system.
	Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns when working in engine during starting procedure	Secure vehicle to prevent it from moving. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
25	Conduct engine test run and inspect exhaust system for leaks

EXHAUST SYSTEM

EXHAUST SYSTEM