Mass Air Flow Sensor Code
Thread Starter
Junior Member
Joined: May 2011
Posts: 58
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From: 50 Acres in North Carolina
Depends on the day...
Mass Air Flow Sensor Code
2013 ML350 Bluetec with 63K
I’ve got a check engine light that points to a P0101 error code (Can’t Measure Air Flow) and it looks like I’m going to have to replace the Mass Air Flow Sensors. Anyone done this on a ML350 Bluetec before and is there any way to possibly “clean” them and get more life out of them? I found some on eBay but I’m reluctant to buy as I have no idea how old they are of how much longer before they fail. So I guess my only option is to get them from MB parts.
Oh, one last thing. The air filters don’t look like they’ve ever been replaced, even though I’ve had MB do all the maintenance on the car since I’ve owned it. I’m wondering if changing the filters would help the MAF sensors breath and possibly fix the problem?
TIA! Jim
I’ve got a check engine light that points to a P0101 error code (Can’t Measure Air Flow) and it looks like I’m going to have to replace the Mass Air Flow Sensors. Anyone done this on a ML350 Bluetec before and is there any way to possibly “clean” them and get more life out of them? I found some on eBay but I’m reluctant to buy as I have no idea how old they are of how much longer before they fail. So I guess my only option is to get them from MB parts.
Oh, one last thing. The air filters don’t look like they’ve ever been replaced, even though I’ve had MB do all the maintenance on the car since I’ve owned it. I’m wondering if changing the filters would help the MAF sensors breath and possibly fix the problem?
TIA! Jim
MBWorld Fanatic!
Joined: Apr 2016
Posts: 1,124
Likes: 205
From: NW
2018 GLC 4MATIC
Jim, sensor failed due to clogged air filter.
As far as I know if it fails its gone.
There are a lot of MB dealers who sells online with wholesale prices, local dealer most likely will add margin to the cost like 25-50%.
I personally buys from mboemparts.com or getmercedesparts.com sometimes they send you free shipping codes.
never had any issues.
Replace air filters and sensor.
There are many discussions how often to change air filters. I found out after 10K they were so bad. By book MB recommends to replace them every 40K (unbelievable).
Good luck.
As far as I know if it fails its gone.
There are a lot of MB dealers who sells online with wholesale prices, local dealer most likely will add margin to the cost like 25-50%.
I personally buys from mboemparts.com or getmercedesparts.com sometimes they send you free shipping codes.
never had any issues.
Replace air filters and sensor.
There are many discussions how often to change air filters. I found out after 10K they were so bad. By book MB recommends to replace them every 40K (unbelievable).
Good luck.
Thread Starter
Junior Member
Joined: May 2011
Posts: 58
Likes: 0
From: 50 Acres in North Carolina
Depends on the day...
It's been an interesting morning but the Readers Digest version is that MB doesn't sell just the Mass Air Flow Sensor anymore. Turns out that they now want us to buy the entire Connector Tube assembly and included will be the new MAF sensors. (Well over $1,100.00) 
Forget that (aside from the MAF sensors) there is nothing wrong with the old connector tube or any of the parts associated with it, they insiste that you replace the whole thing. Why? Doesn't MB make enough off of us already? I mean, what's next? I halfway expect MB to tell me I have to replace the entire engine just because the muffler is worn out.
I'm a fan of quality German engenering but I'm also a fan of getting some support from those companies as well. And fleecing us at every turn isn't getting it for me.
Forget that (aside from the MAF sensors) there is nothing wrong with the old connector tube or any of the parts associated with it, they insiste that you replace the whole thing. Why? Doesn't MB make enough off of us already? I mean, what's next? I halfway expect MB to tell me I have to replace the entire engine just because the muffler is worn out.I'm a fan of quality German engenering but I'm also a fan of getting some support from those companies as well. And fleecing us at every turn isn't getting it for me.
MBWorld Fanatic!
Joined: Apr 2016
Posts: 1,124
Likes: 205
From: NW
2018 GLC 4MATIC
Yep. You need to buy the whole thing.
Check this video
From the post
https://mbworld.org/forums/showthrea...=690548&page=1
Check this video
From the post
https://mbworld.org/forums/showthrea...=690548&page=1
