Remove/install hot film mass air flow sensor - AR07.07-P-1453RX (SL550)
ENGINE 273 in MODEL 230
| Remove/install | |||
| 1 | Switch off ignition | ||
| 2 | Remove air filter housing (1) | AR09.10-P-1150RX | |
| 3 | Disconnect 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) | Never use force as the notches can break off! If notches break then the complete hot film MAF sensor (B2/5) must be installed new. Pull the right notch (3a) upwards while doing this until it can no longer latch onto the resonance intake manifold (4). |
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| 5 | Unlatch the left notch (3b) for the hot film MAF sensor (B2/5) on the resonance intake manifold (4) and tilt the 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 the spring steel sheet (5) and remove the hot film mass air flow sensor (B2/5) from the air duct housing (6) | ||
| 7 | Check the gasket (7) between the air duct housing (6) and the hot film mass air flow sensor (B2/5) for damage | ||
| 8 | Check the 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 installed anew. If the spring sheet steel (5) is damaged, then the entire air duct housing must be replaced. | |
| 9 | Install in the reverse order | ||
| 10 | Read out fault memory | - | |
| Connect STAR DIAGNOSIS and read out fault memory | AD00.00-P-2000-04A |