Remove/install catalytic converter · ar4920p0100mrh · Mercedes-Benz WIS

AR49.20-P-0100MRH

Remove/install catalytic converter

13.12.2018

Engine

264 in model 213, 238, 257

1	Catalytic converter
2	Clip
3	Clip
4	Bolts

P49.10-3244-06

 Warning	Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.	Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.	AS49.00-Z-0001-01A
 Caution	Risk of injury caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
Topical note	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
 	Remove/install
1	Remove upper engine cover.		AR01.10-P-2405MRH
		 Installation: Only install upper engine cover after the leak test.
2	Release and disconnect lambda sensor electrical connector upstream of catalytic converter (G3/2) and unclip electric line.		AR07.04-P-0086MRH
3	Release and disconnect lambda sensor electrical connector downstream of the catalytic converter (G3/1) and unclip electric line.		AR07.04-P-0085MRH
4	Remove center and rear sections of lower engine compartment lining.	Engine 264 in model 213, 238	AR61.20-P-1105LWE
		Engine 264 in model 257	AR61.20-P-1105FR
		 Installation: Only install center and rear lower rear engine compartment paneling again after leak test.
5	Remove clamp (3).	 Installation: Replace clamp (3).
		 Engine 264 in model 238Bolt, exhaust system clamp to catalytic converter	*BA49.10-P-1002-02M
		 Engine 264 in model 213, 257Clamp at catalytic converter and front exhaust system	*BA49.10-P-1002-02P
6	Remove clamp (2).	 Installation: Replace clamp (2).
		 Engine 264 in model 238Screw/bolt, catalytic converter clamp to exhaust gas turbocharger	*BA49.10-P-1001-02M
		 Engine 264 in model 213, 257Clamp at turbocharger and catalytic converter/front exhaust line	*BA49.10-P-1001-02P
7	Remove screws/bolts (4).	 Engine 264 in model 238Screw/bolt/nut, catalytic converter to bracket	*BA49.10-P-1004-02M
		 Engine 264 in model 213, 257Clamp between rear muffler	*BA49.10-P-1004-02P
8	Remove catalytic converter (1).
9	Remove oxygen sensor upstream of catalytic converter (G3/2).	When replacing catalytic converter (1).
			AR07.04-P-0086MRH
10	Remove lambda sensor downstream of catalytic converter (G3/1).	When replacing catalytic converter (1).
			AR07.04-P-0085MRH
	Clean
11	Remove combustion and corrosion residue at connecting points.
12	Install in the reverse order.
 Warning	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
13	Perform an engine test run; check the engine for proper operation and the exhaust system for leaks.
14	Install center and rear lower engine compartment lining.	Engine 264 in model 213, 238	AR61.20-P-1105LWE
		Engine 264 in model 257	AR61.20-P-1105FR
15	Install upper engine cover.		AR01.10-P-2405MRH

 Exhaust system

Number	Designation		Model 238 with engine 264
BA49.10-P-1001-02M	Screw/bolt, catalytic converter clamp to exhaust gas turbocharger	Nm	17

 Exhaust system

Number	Designation		Model 213 with engine 264	Model 257 with engine 264
BA49.10-P-1001-02P	Clamp at turbocharger and catalytic converter/front exhaust line	Nm	17	17

 Exhaust system

Number	Designation		Model 238 with engine 264
BA49.10-P-1002-02M	Bolt, exhaust system clamp to catalytic converter	Nm	22

 Exhaust system

Number	Designation		Model 213 with engine 264	Model 257 with engine 264
BA49.10-P-1002-02P	Clamp at catalytic converter and front exhaust system	Nm	25	25

 Exhaust system

Number	Designation		Model 238 with engine 264
BA49.10-P-1004-02M	Screw/bolt/nut, catalytic converter to bracket	Nm	25

 Exhaust system

Number	Designation		Model 213 with engine 264	Model 257 with engine 264
BA49.10-P-1004-02P	Clamp between rear muffler	Nm	20	20

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