When faulty (what can happen easily) must replace the whole ECU. Can I buy only the sensor and replace it (it is soldered on the board).
The main problem is that on A class the ECU is mounted on the intake air track and the MAF is part of it. So, you can not be replace only the sensor, must replace the whole ECU. I'm looking for the manufactorer of the MAF sub block (which will cost a portion of the whole unit). Or, can I buy another MAF and use only the sensor from it?

Its a large sensor that's part of the engine air intake system. The computer uses it to sense the volume of air the engine is receiving to make fuel and ignition adjustments. Could cause no start or bad running vehicle.Its replaceable as a separate unit.

mass air flow sensor is located at the air filter housing. it cost about 200.00. you can find out if it bad by taking a flash light and shine it into the sensor thin wre.if you see hair or lint,it is bad.this is the most common problem on Mercedes .it goes bad so fast,Mercedes offer a rebuilt part

hi i have the same problem there is a company in derby that will re ferb the pare for 250+ you cant buy an ecu because its coded to the car merc want 1075 for the repair ashly Ecu electronics
28 leabrooks road
alfreton
derbyshire
DE55 4HB
Ecu electronics
28 leabrooks road
alfreton
derbyshire
DE55 4HB
ashley_p_1987@hotmail.com

hope this is helpful

ashley_p_1987@hotmail.com