This guide will show you how to replace the Mass Air Flow (MAF) sensor on Mercedes Benz. If you get any of these codes, P0100, P0101, P0102, P0103, and P0104, you most likely need your MAF replaced.

Some of the most common symptoms of a bad Mass Air Flow sensor in Mercedes Benz cars are:

• The engine dies and stalls soon after you start it.
• The engine hesitates when you accelerate.
• Poor throttle response
• Engine hiccups
• Engine displays unusually lean or rich idling

Sometimes cleaning the sensor could help, but we would recommend replacing it. A new MAF sensor can be found for less than $30; check out this one on Amazon.

Related Part Numbers

 

 

 

 

 

How to replace the Mass Air Flow Sensor?
Here is how Step by Step

 

1. Remove the engine cover. You pull it up, as shown in the pictures below.
   Lift one side first.
   
2. Lift the other side and remove the whole cover.
   
3. Locate the Mass Air Flow Sensor towards the back of the engine.
   
4. Disconnect the wire harness plugged into the MAF. Press the tabs; one is on the top, and another is on the bottom. You can’t see it in this picture.
   
5. Remove the hose shown in the picture below. The hose will pull straight out.
   
6. Push out the two plastic tabs shown below.
   
7. Pull the MAF housing towards the back of the engine. As you do this, try to release the two tabs that hold it in place, as shown below. Shown removed so you can see what we are talking about.
   
8. The MAF assembly comes straight out.
   
9. Replace the MAF sensor with a new one. You may have the whole housing, which makes this job easier.
   
10. Install everything back in reverse order, and you are done.HINT: If you want to remove the MAF sensor to clean it, you need to remove it from the housing. To do so, use pliers to remove the two screws, as shown below. The screws need a secure screwdriver, but using pliers does the trick.
    

 

Video on how to replace the MAF & clean it. 

Where to buy Mass Air Flow MAF Sensor?

If you want a MAF sensor at a fraction of dealer prices, check out Amazon. Here are some popular Mercedes Benz  OEM, Bosch, and aftermarket MAF sensors on Amazon.

What Scanner can I use to Troubleshoot Sensors?

If you’re experiencing problems with your Mercedes-Benz, the YOUCANIC full system diagnostic scanner can provide invaluable assistance in troubleshooting the issues. By connecting to your car’s onboard computer, the scanner can read fault codes and provide detailed information about any problems with your engine, transmission, brakes, and other systems. Additionally, the scanner can perform diagnostic tests on various systems, such as the ABS, airbag, and steering systems, to help identify the underlying cause of any issues.

In addition to providing diagnostic information, the YOUCANIC scanner can save you time and money on repairs by enabling you to perform simple fixes yourself. For example, if you notice the check engine light on, the scanner can assist you in identifying the problem and determining if it’s a simple issue you can address at home or if you need to take it to a mechanic. This can help you avoid unnecessary trips to the repair shop, saving you both time and money.

Overall, the YOUCANIC full system diagnostic scanner is a powerful tool to help you maintain and troubleshoot your Mercedes-Benz. It’s an excellent investment for both DIY mechanics and professional technicians, as it can assist in diagnosing and resolving even the most complex automotive problems easily, saving you time and money on costly repairs.

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