Remove/Install Catalytic Converter - AR49.20-P-0100MRI

Engine 264 in model 205, 253 

Fig 1: Catalytic Converter Components Location - Engine 264 In Model 253

Courtesy of MERCEDES-BENZ USA

	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 danger zone.	AS49.00-Z-0001-01A
	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
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove/install
1	Remove Engine cover.	Only install Engine cover after the leak test.	AR01.10-P-2405MRI
2	Release and disconnect lambda sensor electrical connector upstream of catalytic converter (G3/2) and unclip electric line.		AR07.04-P-0086MRI
3	Release and disconnect lambda sensor electrical connector downstream of the catalytic converter (G3/1) and unclip electric line.		AR07.04-P-0085MRI
4	Remove center and rear Engine compartment lining.	Installation: Install center and rear Engine compartment lining only after the leak test.	AR61.20-P-1105LW
5	Remove Clamp (3).	Replace Clamp (3). Clamp at catalytic converter and front exhaust system	*BA49.10-P-1002-02P
6	Remove Clamp (2).	Replace Clamp (2). Clamp at turbocharger and catalytic converter/front exhaust line	*BA49.10-P-1001-02P
7	Remove screws/bolts (4).	S Bolt, catalytic converter to bracket	*BA49.10-P-1005-02P
8	Remove catalytic converter (1).
9	Change lambda sensor upstream of catalytic converter (G3/2).	When replacing catalytic converter (1).	AR07.04-P-0086MRI
10	Change lambda sensor downstream of catalytic converter (G3/1).	When replacing catalytic converter (1).	AR07.04-P-0085MRI
	Clean
11	Remove combustion and corrosion residue at connecting points.
12	Install in the reverse order.
	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.		AR61.20-P-1105LW
15	Install Engine cover.		AR01.10-P-2405MRI

EXHAUST SYSTEM

Number	Designation		Model 205 with Engine 264	Model 253 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 205 with Engine 264	Model 253 with Engine 264
BA49.10-P-1002-02P	Clamp at catalytic converter and front exhaust system	Nm	25	25

EXHAUST SYSTEM

Number	Designation		Model 205 with Engine 264	Model 253 with Engine 264
BA49.10-P-1005-02P	Bolt, catalytic converter to bracket	Nm	25	25