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

ENGINE 272, 273 in MODELS 211, 219

Fig 1: Identifying Hot Film Mass Air Flow Sensor Components

G04987426

	Remove/install
	Notes on avoiding damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Turn key in ignition switch to position "0".
2	Remove air filter housing (1).		AR09.10-P-1150TS
3	Remove the electrical connector (2) at the hot film mass air flow sensor (B2/5)
4	Disengage the right notch (3a) of the hot film mass air flow sensor (B2/5) at the resonance intake manifold (4)	Pull right notch (3a) upwards while doing this until it can no longer latch onto resonance intake manifold (4).
5	Unlatch left notch (3b) for hot film MAF sensor (B2/5) on resonance intake manifold (4) and tilt hot film MAF sensor (B2/5) slightly to the rear	Do not the damage the grid (A) in the process as it cannot be replaced separately!
6	Disengage spring steel sheet (5) and remove the hot film mass air flow sensor (B2/5) from air duct housing (6)	Do not deform spring steel sheet (5) in the process permanently; it will not get locked properly at the hot film mass air flow sensor (B2/5) during installation.
	Checking
7	Check the gasket (7) between the air duct housing (6) and the hot film mass air flow sensor (B2/5)	Inspect for damage, install new parts if necessary.
8	Check right notch (3a), left notch (3b) as well as spring steel sheet (5)	Inspect for damage, install new parts if necessary.
9	Install in the reverse order
10	Read out fault memory	STAR DIAGNOSIS diagnosis system	*WH58.30-Z-1048-13A
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A

COMMERCIALLY AVAILABLE TOOLS

Number	Designation
WH58.30-Z-1048-13A	STAR DIAGNOSIS diagnosis system, Compact Passenger Car	6511 1801 00