K & N air filter- 2012 W212
Thread Starter
Super Member
Joined: Dec 2010
Posts: 831
Likes: 13
From: N.C. USA
2015, ML250 BlueTEC
K & N air filter- 2012 W212
Who has replaced oem air filters with K & N #33-2985 ? I am very familiar w/ K&N and have used them in several cars and BIG RV. Just haven't installed them in MB's. Does the new DI engine use 1 or 2 filters? Seems that I have seen 2 being installed on internet. K&N site only mentions 1. Will be getting my A service in March so that will be the time to make a change. Amazon seems as good a place to buy. $40.46 and free shipping.
If you have installed K&N what are your results?
If you have installed K&N what are your results?
Senior Member
Joined: May 2007
Posts: 457
Likes: 61
asdas
Have you checked under your hood? 
On the serious side, I don't want to be Donnie Downer, but if I were you I'd check to see of our cars use heated element type MAFs. Oiled K&N's have been known to kill these types of MAFs and I can't imagine they are cheap to replace.
You say you are familiar with them from prior use, but not all cars use heated element MAFs.
On the serious side, I don't want to be Donnie Downer, but if I were you I'd check to see of our cars use heated element type MAFs. Oiled K&N's have been known to kill these types of MAFs and I can't imagine they are cheap to replace.
You say you are familiar with them from prior use, but not all cars use heated element MAFs.
Junior Member
Joined: Dec 2012
Posts: 32
Likes: 4
2012 E350 Sedan, 2007 Ford GT500
This thread should provide some insight:
https://mbworld.org/forums/e-class-w...n-filters.html
Judging from the layout and routing of the engine air intake I'm thinking the 2012 V6 DI engine only has one air filter, but I don't know for sure ... I have not changed mine yet.
https://mbworld.org/forums/e-class-w...n-filters.html
Judging from the layout and routing of the engine air intake I'm thinking the 2012 V6 DI engine only has one air filter, but I don't know for sure ... I have not changed mine yet.
Last edited by Six_Speed; Feb 3, 2013 at 11:23 AM.
Thread Starter
Super Member
Joined: Dec 2010
Posts: 831
Likes: 13
From: N.C. USA
2015, ML250 BlueTEC
K&N filter
This thread should provide some insight:
https://mbworld.org/forums/e-class-w...n-filters.html
Judging from the layout and routing of the engine air intake I'm thinking the 2012 V6 DI engine only has one air filter, but I don't know for sure ... I have not changed mine yet.
https://mbworld.org/forums/e-class-w...n-filters.html
Judging from the layout and routing of the engine air intake I'm thinking the 2012 V6 DI engine only has one air filter, but I don't know for sure ... I have not changed mine yet.
Last edited by greasykid; Feb 3, 2013 at 01:44 PM.
Super Member
Joined: May 2010
Posts: 672
Likes: 4
From: So. Cal.
Current: 2011 W212 Previous: 2008 W211 2006 550 2001 Rover 1997 W210
I got K&Ns on my car. Took the car in for service B and informed the service advisor NOT to do anything with the air filter. So far dealer hasnt mentioned anything about the warranty being voided.
I'm sure if it came down to it and there were some major problems with the car that had anything to do with anything that dealt with the air filters, they will attribute it to the K&Ns and void the warranty.
I'm sure if it came down to it and there were some major problems with the car that had anything to do with anything that dealt with the air filters, they will attribute it to the K&Ns and void the warranty.
Out Of Control!!
Joined: Jun 2008
Posts: 10,557
Likes: 24
From: Earth
Porsche Macan S SportDesign / Ex M-B's: 11 & 10 & 06 E350's, 02 S500
Apparently K&N's are more harmful than good for these cars, and won't increase any performance (I've even heard some guys claim decrease if anything).
M-B and BMW balance their motors out to a point where things like K&N Air Filters aren't the commodities they were in the old Mustang days (when I was all about K&N's). I'd avoid it and save some $$$$.
M-B and BMW balance their motors out to a point where things like K&N Air Filters aren't the commodities they were in the old Mustang days (when I was all about K&N's). I'd avoid it and save some $$$$.
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Member
Joined: Dec 2012
Posts: 160
Likes: 12
E350 4-Matic, GLE350, Harley Davidson Electra Glide
I don't know about the MB MAF but I had a altima and the MAF went. I was concerned about the issue so I put back the stock filter before getting it to the dealer. They told me that the only failures they had were with K&N filters. Since it occured twice, the second time after the warantee was way over, I decided not to use them in any of my cars anymore
Senior Member
Joined: Nov 2011
Posts: 333
Likes: 1
From: Sacramento, CA
E350 BT
Apparently K&N's are more harmful than good for these cars, and won't increase any performance (I've even heard some guys claim decrease if anything).
M-B and BMW balance their motors out to a point where things like K&N Air Filters aren't the commodities they were in the old Mustang days (when I was all about K&N's). I'd avoid it and save some $$$$.
M-B and BMW balance their motors out to a point where things like K&N Air Filters aren't the commodities they were in the old Mustang days (when I was all about K&N's). I'd avoid it and save some $$$$.
