Important!

This replacement procedure can be used for:
MERCEDES-BENZ C-Class Saloon (W202) C 240 (202.026), MERCEDES-BENZ C-Class Saloon (W202) C 280 (202.029) … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Mass Air Flow Sensor for C-Class Saloon (W202) and other MERCEDES-BENZ models

Mass air flow sensor

Mass air flow sensor for C-Class Saloon (W202) Petrol (170 hp)

Simple DIY car repair steps – Replacing Mass air flow sensor on C-Class Saloon (W202)

Mass air flow sensor for C-Class Saloon (W202) Petrol (197 hp)

Replacement: mass air flow sensor – MERCEDES-BENZ C-CLASS (W202). Tools you need:

                        Electronic spray
                      
                        Crow bar
                      
                        Microfibre towel
                      
                        Fender cover

Buy tools

Replacement: mass air flow sensor – MERCEDES-BENZ C-CLASS (W202). AUTODOC experts recommend:

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.

Replacement: mass air flow sensor – MERCEDES-BENZ C-CLASS (W202). Take the following steps:

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-BENZ C-CLASS (W202). 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-BENZ C-CLASS (W202). 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.
Step 15

Lock the mass air flow sensor retaining clips.
Step 16

Treat the mass air flow sensor connector. Use dielectric grease.
Step 17

Attach the mass air flow sensor connector.
Step 18

Install the air filter housing.

AUTODOC recommends:
Replacement: mass air flow sensor – MERCEDES-BENZ C-CLASS (W202). To avoid damaging the part during installation, do not use excessive force.
Step 19

Install the engine cover and secure it.

AUTODOC recommends:
Make sure the engine cover is properly seated. It should not be displaced with respect to the guiding fasteners and the throttle body air intake hose.Replacement: mass air flow sensor – MERCEDES-BENZ C-CLASS (W202). Do not use excessive force during installation. This may damage the part.
Step 20

Reinstall the air intake hoses.

Step 21

Run the engine for a few minutes. This is necessary in order to make sure that the component operates properly.

Step 22

Shut off the engine.

Step 23

Remove the fender protection cover.

Step 24

Close the hood.

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