K & N filter a bad idea? R230 SL500

[v8lloyd]

hi everyone,

Thinking of buying a pair of K & N Filters for my R230 SL500.

Ive googled this and some recommend not doing it because it damages an air flow sensor because of the oil ?

Any help greatly appreciated !

Thanks

 

[gonzo771]

I wouldn't of thought so.. I'd go for it ..

Sent from my SM-G920F using Tapatalk

 

[daveenty]

Seen the same worrying regarding the oil, but if they're done as they should be then it shouldn't be an issue.

A lot on here, and several other places, have gone for the BMC filters as supplied by PCS in Horndean, and rate them highly.

 

[v8lloyd]

thanks for your replies.

when you say done as they should be do you mean you have to be careful fitting them as well?

 

[whitenemesis]

Careful not to over oil them.

Personally I wouldn't bother, you'll gain nothing in fitting them and could potentially cause issues with downstream components

 

[tanuie]

+1

 

[Yugguy]

There's no hard evidence to say the flow better when clean than a paper.

They do flow better than a paper when dirty.

So just change the paper ones more often.

 

[sc3992]

K & N filters have been proved time and time again to add nothing to the performance of a car, clever marketing makes people spend money on things like this for nothing........

 

[bluepassat]

I had a K & N filter on my W204 C220 CDI...as I purchased it used as soon as I found a non standard filter

took it off straight away and replaced it with a paper filter

no difference

 

[tanuie]

I have used K & N filters in the past and have made no difference at all.

 

[John]

http://www.mbclub.co.uk/forums/amg-lounge/208726-c63-k-n-filters.html

 

[rorf]

K&N a marketing scam - stick to the original filters, after all its not as if they have to be changed so often, and cheap enough.

Keep your cars original:bannana:

 

[John]

Keep your cars original:bannana:

Or do mods that make a real difference.

:bannana:

 

[leef44]

I wouldn't go so far as to say they're just a marketing ploy. They have their niche market. I had an MY05 Subaru Impreza STi PPP. It did help the air flow but the original filter was quite restrictive for the turbo charged engine.

But in this case for an SL500, I would tend to agree with others in that I would have thought it would have negligible effect because the forced induction is belt driven as opposed to exhaust driven so there is no natural flow benefit. Plus there are so many sensors on these engines that any change to set up would need mapping optimisation to gain any benefit.

 

[flango]

Gives you a measured 3 bhp - 4 bhp over stock on a W208 230k would expect similar on most cars