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Home >> Mercedes Benz >> 2023 >> GLA250 Base >> Repair and Diagnosis >> Engine Mechanical >> Exhaust >> Exhaust System -- 247 Chassis >> Testing & Repair >> Remove/Install Exhaust Gas Flap Controller Differential Pressure Sensor - AR49.10-P-0012MFG

Remove/Install Exhaust Gas Flap Controller Differential Pressure Sensor - AR49.10-P-0012MFG

Model 118, 177, 247 with engine 139 

Fig 1: AMG Sound Package/Exhaust Gas Flap Controller Differential Pressure Sensor Components Location - Engine 139 In Model 247
G16050311WARNINGCAUTIONREMOVINGINSTALLINGTORQUE SPECIFICATIONINSTALLATION IMPORTANTSPECIAL TOOLIMPORTANTREFER TO SELF-DIAGNOSTIC SYSTEMSWARNINGCourtesy of MERCEDES-BENZ USA
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
REMOVINGINSTALLING Remove/install     
1 Raise vehicle.   AR00.60-P-1005-01A
2 Release heat shield (1) and position outside of working area.    
3 Release and disconnect electrical connector (2).    
4 Unclip exhaust gas hose (5) from holder (3).    
5 Remove the nut (4). TORQUE SPECIFICATION M6x1 *BA00.10-P-1002-04A 
6 Open clamp (6). INSTALLATION IMPORTANT Replace clamp (6).
SPECIAL TOOL Pliers for click clamps
Fig 2
7 Remove AMG Sound Package sensor (B28/39) with exhaust gas hose (5). IMPORTANT The AMG Sound Package sensor (B28/39) and the exhaust gas hose (5) form a unit.  
8 Install in the reverse order.    
9 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06MFA
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
10 Perform an engine test run; check engine for proper operation and check exhaust system for leak tightness.    
METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143

Number Designation 8.8 10.9
BA00.10-P-1002-04A M6x1 Nm 9 13
Fig 2: Identifying Pliers For Click Clamps (171 589 00 37 00)
G16050312Courtesy of MERCEDES-BENZ USA