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Home >> Mercedes Benz >> 2008 >> GL320 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Fuel, Ignition, Engine Control -- Testing & Repair -- 164 Chassis) >> Testing & Repair >> Remove/install hot film mass air flow sensor - AR07.07-P-1453 >> Remove/install hot film mass air flow sensor - AR07.07-P-1453GZS (ML63 AMG)

Remove/install hot film mass air flow sensor - AR07.07-P-1453GZS (ML63 AMG)

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ENGINE 156 in MODEL 164, 251 

Fig 1: Identifying Hot Film Mass Air Flow Sensor Components
G05257632Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
REMOVINGINSTALLING Remove/install    
DANGER Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof. Keep body parts and limbs well clear of moving parts. AS00.00-Z-0011-01A
1 Open engine hood Model 164 AR88.40-P-1000GZ
    Model 251 AR88.40-P-1000RT
2 Remove the partition wall between the wheelhouses IMPORTANT Only model 251. AR62.30-P-2400RT
3 Remove front engine cover NOTES Do not tilt front engine cover, but lift upwards vertically otherwise the retaining lugs can break off.  
4 Pull cover (3) up and off IMPORTANT depending on which hot film MAF sensor, on the right or left, should be removed.  
5 Open hose clamp (4) IMPORTANT depending on which hot film MAF sensor, on the right or left, should be removed.  
6 Remove air filter housing on right or left IMPORTANT depending on which hot film MAF sensor, on the right or left, should be removed.
IMPORTANT The left hot film mass air flow sensor (B2/6) and right hot film MAF sensor (B2/7) are located respectively on the top section of air filter housing.
AR09.10-P-1150GZS
7 Remove screws (5)    
8 Disconnect top section of air filter housing (1) from bottom section of air filter housing (2) IMPORTANTInstallation:  The left hot film mass air flow sensor (B2/6) and right hot film MAF sensor (B2/7) must be completely replaced with the top section of air filter housing (1) in the case of a defect.  
9 Install in the reverse order    
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
10 Carry out engine test run