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

ENGINES 271.8 in MODEL 172, 204, 207, 212 

Fig 1: Identifying Catalytic Converter Remove/Install Components
G10106186Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER 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
NOTES Notes on self-locking nuts and bolts   AH00.00-N-0001-01A
1 Unscrew nuts (3) from catalytic converter on turbocharger TORQUE SPECIFICATION *BA09.40-P-1004-01Q 
2 Remove engine compartment paneling Model 204  
Model 172 AR61.20-P-1105W
Model 207, 212 AR61.20-P-1105EW
3 Disconnect electrical connectors for oxygen sensors and unclip electrical line from brackets See remove/install heated O2 sensor. AR07.52-P-5303CW
4 Remove bolts (2) from catalytic converter (1) IMPORTANT Model 204 *BA49.10-P-1005-01AC 
IMPORTANT Model 207 *BA49.10-P-1021-01AE 
IMPORTANT Model 212
IMPORTANT Model 172
*BA49.10-P-1021-01AE 
5 Unscrew nuts (4) for CAT (1) TORQUE SPECIFICATION *BA09.40-P-1002-01Q 
6 Remove catalytic converter (1) downwards    
7 Install in the reverse order    
INSPECT Checking     
8 Check installation position and clearance of exhaust system IMPORTANT The exhaust system must be mounted free of tension, align exhaust system if required.  
DANGER Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.
AS00.00-Z-0005-01A
9 Test run engine and check exhaust system for leaks    
EXHAUST SYSTEM

Number Designation Engine 156, 271, 272 in model 204
BA49.10-P-1005-01AC Bolt, catalytic converter flange to center muffler Nm 20
EXHAUST SYSTEM

Number Designation Engine 271, 272, 273, 276, 278 in model 207
BA49.10-P-1021-01AE Bolt, catalytic converter connecting pipe to catalytic converter Nm 20
EXHAUST SYSTEM

Number Designation ENGINE 156, 157, 271, 272, 273, 276, 278 in MODEL 212
BA49.10-P-1021-01AE Bolt, catalytic converter connecting pipe to catalytic converter Nm 20
EXHAUST SYSTEM

Number Designation Engine 271 in model 172
BA49.10-P-1001-01AI Bolt, exhaust pipe flange to CAT Nm 20
TURBOCHARGER

Number Designation Engine 271.8
BA09.40-P-1002-01Q Nut, bracket to turbocharger Nm 30
BA09.40-P-1004-01Q Nut, catalytic convertor to turbocharger Nm 25