How to change mass air flow sensor on Mercedes W203 – replacement guide
MERCEDES-BENZ C-Class Saloon (W203) C 320 (203.064), MERCEDES-BENZ C-Class Saloon (W203) C 320 4-matic (203.084), MERCEDES-BENZ C-Class Saloon (W203) C 240 (203.061) … View more
The steps may slightly vary depending on the car design.
How to change mass air flow sensor on MERCEDES-BENZ W203 C-Class [TUTORIAL AUTODOC]
Mass air flow sensor
- Сlear the trouble codes from the electronic control unit if necessary.
- Make sure that no dust or dirt gets into the air duct components and the throttle body.
- All work should be done with the engine stopped.
- Step 1
Open the bonnet.
- Step 2
Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
- Step 3
Remove the engine cover.
AUTODOC recommends:Replacement: mass air flow sensor – Mercedes W203. Do not use excessive force when removing the part as this may damage it.
- Step 4
Remove the air intake hoses.
- Step 5
Clean the air filter cover and housing.
- Step 6
Remove the air filter housing.
AUTODOC recommends:Replacement: mass air flow sensor – Mercedes W203. Do not use excessive force when removing the part as this may damage it.
- Step 7
Detach the mass air flow sensor connector.
- Step 8
Release the mass air flow sensor retaining clips. Use a crowbar.
- Step 9
Cover the throttle body with a microfibre towel to prevent dust and dirt from getting into the system.
- Step 10
Clean the mounting seat of the mass air flow sensor.
- Step 11
Remove the microfibre towel from the throttle body.
- Step 12
Release the mass air flow sensor retaining clips. Use a crowbar.
- Step 13
Remove the mass air flow sensor.
- Step 14
Install a new mass air flow sensor. Make sure you hear a click indicating that it is locked in place.
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