Remove/install hot film mass air flow sensor - AR07.07-P-1453GZG

ENGINES 273 in MODEL 463 

Fig 1: Identifying Hot Film Mass Air Flow Sensor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
1	Remove air filter housing (1).		AR09.10-P-1150GZG
2	Disconnect electrical connector (3) at the hot film mass air flow sensor (B2/5)
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
3	Release notch (4, 5) of hot film mass air flow sensor (B2/5) on intake manifold	Do not use force as the notches (4, 5) may break off! If the notches (4, 5) break off the complete hot film mass air flow sensor (B2/5) must be replaced. Pull notches (4, 5) outwards until they cannot engage in the intake manifold again
4	Press back retaining clamp (6) and remove hot film mass air flow sensor (B2/5) upwards	Do not use force as the notches (4, 5) may break off! If the notches (4, 5) break off the complete hot film mass air flow sensor (B2/5) must be replaced. In the process do not damage the guard net (7), it cannot be replaced separately
	Checking
5	Check seal (8) between air duct housing (9) and the hot film mass air flow sensor (B2/5)	Check seal (8) for damage; replace if necessary.
6	Check notches (4, 5)	If notches (4, 5) are damaged, then the complete hot film MAF sensor (B2/5) must be replaced.
7	Install in the reverse order
8	Read out fault memory and erase if necessary	Stored faults which can result from electrical lines being disconnected or from simulation have to be processed and erased in the fault memories after completing the work.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A