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

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ENGINES 651 in MODELS 166, 172, 204, 207, 212, 218, 221

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

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Open engine hood	Model 166	AR88.40-P-1000GQ
		Model 172 Model 204.0/2/9, 218, 221	AR88.40-P-1000V
		Model 204.3, 207, 212	AR88.40-P-1000EW
2	Remove cylinder head cover trim
3	Loosen hose clamp (1) and detach air intake pipe (2) from hot film mass air flow sensor (B2/5)	Check hose clamps (1) for damage; replace if necessary.
4	Disconnect electrical connector (3) at the hot film mass air flow sensor (B2/5)
5	Remove screw/bolts (4) and take hot film MAF sensor (B2/5) out of the air filter housing	Replace sealing ring on air filter housing. Observe installation position of hot film mass air flow sensor (B2/5). The arrow on the housing identifies the flow direction of the intake air.
6	Install in the reverse order
7	Connect STAR DIAGNOSIS, read out fault memory and erase if required	Stored faults which may be caused by assembly work, test work, removed lines or a simulation, must be processed and erased in fault memories after completing the work.	AD00.00-P-2000-04A