y420

i have an 03 clk 55... ive heard arguments for both sides.. is one really better than the other? or just preference? also, i heard that these can cause MAF sensor errors or leak oil or something like that.. can someone educate a noob here? how much do they cost? where can i purchase one? any performance increase? thanks people

GiZzO

people have said the greens have a less tendency to faul the MAF. Gains should be the same.
Both are $100+ bucks for the pair, for the 209 should be able to grab these anywhere. I Had to dig deep for green filters for my 208.

da_guitarist

Def a performance increase. These are similar to stock filters, except the filters have larger physical openings so more air can pass through. However, to keep the filters working properly and debris from entering, the filters must stay oiled. This oil can be applied in excess, therefore causing MAF sensor errors. Its the same argument for either group. I couldn't tell you which brand has the holes sized the best for optimal performance w/out risking engine issues. I have BMC and they work great. My K&N's were fine before. You just have to keep them properly oiled and cared for.

ohlord

neither of them out flow oem filters and both flow up to 8 times more dirt than oem filters
Just install new filters from places like www.autohausaz.com
You will just spend needless money on no gain filters that are smoke and mirrors
if you insist that snake oil filters from K/N or green do something a good oem filter does not.

y420

i think im gonna try out the green filters.. i have the w209.. so i need 2 filters right? i just wanna be 100% sure.. thanks for all the replies guys, i know changing out the air filters isnt really the biggest deal, i truly appreciate the help!

ohlord - i appreciate the reply and consider everyone's opinions, but i need to change my filters, and ive already decided to go aftermarket. thanks for that site though, could be useful later on.

320 dreamer

there were some threads on green filters deteriorating due to the heat in the engine compartment. imo go with the k&n filters. my car came with them and after using the k&n cleaner kit mine look like new at 46,000 miles. remember to use the proper spray oil and let them dry completely before installing and running the engine to avoid fouling the maf

da_guitarist

Really? Have you not seen all the before and after dynos w/ these filters? They're always good for a min of 3-5 hp at peak and they show gains through the entire range. The oiled cotton filters *ALWAYS* outflow any stock paper filters. You just have to maintain them.

Slater126

+1 on this. The Green Filters I bought for my C32 (different car than your granted) didn't even properly fit in the airbox! They were just a tad too small.

I think the gains are questionable at best. No one has ever documented major gains with consistent testing (where all is equal) that I've seen. And if you oil them too much they can foul sensors and if you don't oil them enough, they won't filter. Holy Catch-22! And they don't filter as well as paper in the first instance anyway.

Save yourself some money and go with the OEM paper filters. IMHO.

SoCalCLK

I had both K&N and Green on my old W208 CLK430. K&Ns fit better, and did not warp over time due to engine heat.

Currently on my W209, I am running K&Ns. Yes, you need 2 filters. They are great, and have not triggered any MAF sensor issue over 25,000 miles of use.

I recently took them out to inspect them and shake out any loose dirt. They clean magnificently and the intake compartment is completely clean.

If you choose aftermarket for the minimal (if any) HP gains, I recommend K&N.

y420

thanks socal, i have been researching more and hear more good things about the K&Ns than the greens.. i think i will go with the K&Ns, even if some ppl say they dont give you a performance increase, im just gonna try em out i have to change my filters anyways.

y420

btw, socal, those rims are DOPE.. im plannin to get some new shoes next summer.. no point right now.. new england winter is approaching.. lol

SoCalCLK

Thanks for the compliment, bro. I think they fit the W209 CLK bodystyle nicely.


I think you'll really like the K&Ns, they help the engine breathe better and it sounds better at acceleration and at hwy speeds.

jturkel

K&Ns, not Greens. Greens fall apart and bits of pieces of the filter may end up places where you dont want them to be

and as far as the OEM filters flowing better, that is completely incorrect. Dynos and even 1/4mile/trapspeeds have shown that K&Ns and Greens pick up power over the OEM filters. I can confirm that from personal experience

GiZzO

where exactly did you see the warping and breaking apart on the green filters? I will watch mine i drive my car pretty hard.

SoCalCLK

Hey GiZzo, what up! It was on my CLK430. After installed the Green filters, I checked them after around 10,000 miles, and I noticed 'warping' at the edges of the filter. The filter was uneven, and it looked like it was warped due to intense heat. It was slight, but enough to make me go back to K&N.

Jons95c36amg

I just use the OEM filters. Not worth the 1-2hp. Or worrying about your expensive MAF.