P0102 and CEL ON
Thread Starter
Junior Member
Joined: Mar 2021
Posts: 54
Likes: 4
2015 GL350 Bluetec
P0102 and CEL ON
Recently the CEL on my 2015 GL350 X166 came ON. I hooked up my OBDII and got error P0102. I cleared the code and it was fine for 2-3 days. Then again the CEL came ON with the same error P0102. I cleared it again and after a few hours CEL ON again with P0102 and P0103. I cleared the codes again and once again the CEL came ON but with just error code P0102.
I suspect the MAF sensor is causing the issue (well the entire $$$ assembly since MB is weird in general). Also, sometimes I feel the engine hesitating with spontaneous "misfires/kicks". I am not sure if it is related though.
Do you guys have any previous experience with P0102? Do you think is MAF related?
NOTE: I did the AEM diesel recall and the CEL started show up about 2 months after the AEM was completed. Also I noticed reduced fuel efficiency, and only once the car wouldn't change 1st to 2nd and 2nd to 3rd gear unless the rpm were above 3500-4000rpm.
Thank you
LL
I suspect the MAF sensor is causing the issue (well the entire $$$ assembly since MB is weird in general). Also, sometimes I feel the engine hesitating with spontaneous "misfires/kicks". I am not sure if it is related though.
Do you guys have any previous experience with P0102? Do you think is MAF related?
NOTE: I did the AEM diesel recall and the CEL started show up about 2 months after the AEM was completed. Also I noticed reduced fuel efficiency, and only once the car wouldn't change 1st to 2nd and 2nd to 3rd gear unless the rpm were above 3500-4000rpm.
Thank you
LL
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Joined: Mar 2017
Posts: 6
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From: Columbia & Austin
C300 Daily, GL350 Trips & Towing, NSX Shows and C&C's, S2000 Weekends and Ice Cream Runs, Odyssey
Hi L-L,
Were you ever able to get on top of this?
I have a 2014 GL350 Bluetec with a persistent MAF code and lighting up the dash CEL.
Prior owner was a "mechanic" who, of course, reset it for me to buy and then when I called him said "yeah, just couldn't ever get that to stay off."
So, he screwed me, but I want to keep the car anyway.
First, I bought a brand new, Mercedes official, "Batwing" dual MAF enclosure and installed it.
I used my ICarSoft Mercedes to scan again and reset again all the error codes.
Within minutes, CEL back on. In any case, by the third start up every time.
Has poling oil in base of turbo every time I take off the MAF, which I clean up, but assumed it was really the PCV.
Bought an official, Mercedes PCV and installed it. (Let me tell you, getting to those blind bolts facing the firewall is something you do NOT want to do LOL).
Did the full icarsoft reset again.
Once again, within minutes the CEL was back.
Frankly, I'm stuck now. Am I just going to drive it with this CEL on forever and pray it doesn't start flashing?
BTW, I've owned a '13 ML350 Bluetec for over a decade and over 100K miles and never had THIS problem at all.
Were you ever able to get on top of this?
I have a 2014 GL350 Bluetec with a persistent MAF code and lighting up the dash CEL.
Prior owner was a "mechanic" who, of course, reset it for me to buy and then when I called him said "yeah, just couldn't ever get that to stay off."
So, he screwed me, but I want to keep the car anyway.
First, I bought a brand new, Mercedes official, "Batwing" dual MAF enclosure and installed it.
I used my ICarSoft Mercedes to scan again and reset again all the error codes.
Within minutes, CEL back on. In any case, by the third start up every time.
Has poling oil in base of turbo every time I take off the MAF, which I clean up, but assumed it was really the PCV.
Bought an official, Mercedes PCV and installed it. (Let me tell you, getting to those blind bolts facing the firewall is something you do NOT want to do LOL).
Did the full icarsoft reset again.
Once again, within minutes the CEL was back.
Frankly, I'm stuck now. Am I just going to drive it with this CEL on forever and pray it doesn't start flashing?
BTW, I've owned a '13 ML350 Bluetec for over a decade and over 100K miles and never had THIS problem at all.
