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

ENGINE 272 in MODEL 204 

ENGINE 272, 273 in MODEL 207 

Illustrated on model 204 

Fig 1: Identifying Hot Film Mass Air Flow Sensor Remove/Install Components - Illustrated On Model 204

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
1	Switch off ignition
2	Remove air filter housing (1).		AR09.10-P-1150CV
3	Disconnect electrical connector (2) at hot film mass air flow sensor (B2/5)
4	Disengage right notch (3a) for 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 the resonance intake manifold (4).
5	Unlatch left notch (3b) for hot film MAF sensor (B2/5) on the 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 hot film mass air flow sensor (B2/5) from the 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 seal (7) between air duct housing (6) and hot film MAF sensor (B2/5) for damage; replace if necessary
8	Check notches (3a, 3b) and spring steel sheet (5) for damage	If notches (3a, 3b) are damaged, then the entire hot film MAF sensor (B2/5) must be replaced with a new one. If the spring steel sheet (5) is damaged, then the entire air duct housing (6) must be replaced.↓
		Replace air duct housing.	AR09.20-P-0080CV
9	Install in the reverse order
10	Read out fault memory and erase if necessary
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A