I'm changing the 2 engine air filters on my '05 SL500 and am stumped as to how the center rear catch(s) release the circular clamp over the throttle valve actuator and how the vent hose to the crankcase is disconnected. I've removed both the suction air ducts and the forward engine cover piece and see how the housings disengage from the bulb holders but am unsure as to which way to push or pull on the clamp catch(s) - is this done after or before I lift the housings off the bulb holders? Also, where and how do I disengage the vent hose? e.g. The vent hose appears to have some sort of plastic connector inserted midway the filter housing and the crankcase - is this the disconnect point (pull/twist?) or is the hose pulled out of the crankcase or housing end? I'm concerned I just might break something if I apply force to the wrong parts. Thanks for any help on this...

Bill Iseman

 

All you do is remove the front plastic cover, the two plastic air inlet hoses and then lift up on the housing. There are no clips holding it down. Then turn it over and remove the torx screws and the two pieces come apart.

 

How do you remove the front plastic cover? Do you just pull it towards the front?
Thanks

 

Yes, check for any tab releases along the plastic periphery and pull towards the front...you may also have to first remove the oil filler cap for clearance...

 

Great, thanks for the info!

 

Lee Wireless,
thanks for the reply...you're absolutely right about the removal procedure...apparently, I got unnecessarily confused about "ring catches" and "vent hose" connections after viewing the illustrations in the MB Service CD which dealt with a non-USA variant of the V8 engine the USA variant (Engine Model # 113.963) has none of these extras... the removal and replacement was a snap...

 

DEFINITELY remove the oil check plug in the back (near firewall). I snapped mine off (albeit it was a tad cool up here in Canada at the time) when repositioning the filter housing....

 

Does anyone use or have feedback on K&N's or Green filters for the SL?

 

Yes just had a thread about that on the W220 AND R230 , here are the links let me know if it helped. after all that i went with the regular MANN stock filters on both of my cars , and i purchased them both for $62 shipped . free shipping with orders over $50 > http://www.autohausaz.com/index.html

W220 https://mbworld.org/forums/s-class-w...ml#post3191377

R230 SL500 https://mbworld.org/forums/sl-class-...ml#post3191381



Mann produce the OEM filters.

K&N don't filter as well as the standard paper filters.

Stick with the oem style paper filters from Mann.