So the 55's don't have MAF's, do the 63's??

never really had any problems with k&N just take them out of the pack and let it sit for a few hours.

Installed K&N filters, CEL P0170 popped. Took the intake apart and reseated everything. One drive cycle later, CEL went away. I confirmed the code was stored, cleared it and will wait and see what happens. I believe I must have had a leak caused by incorrect installation. I had K&N filter on my CLS for two years with no issues ever.

This thread worries me a little. I've been bored......contemplating what to replace my recently departed SL with.....and ordered K&N's for the E63 yesterday.

I'll be sure they are dry before installing, hope for a few ponies, and no CEL!

i had a similar issue, reoccurring CEL which grew more frequent after some hard driving, dealer replaced intake gaskets and PROPERLY torqued intake, apparently it wasn't done properly from the factory, and with enough use the problem showed up. apparently common after time

I installed mine on friday. I did clean the excesos out and also the following recommended by my mech:

A) turn key to position 2 and wait at least 30 seconds.
B) turn off
C) turn car on without accelerating ... After 30 secs turn off.


I'm not sure it these instructions are real or mere snake oil, but no CEL on mine.

Been using K&N's for the past 10 years myself. E430 S500 and now E55. As one member stated wipe down the excessive oil from the filters let "air dry" in the sun for a few hours flip let them soke up the sun for another few hours, lightly tap them to make sure fully dry. Install and Enjoy-

However if you DO not follow those easy rules you will get a CEL along w/false codes. Speaking from experience-

This is why I run paper filters when I'm cleaning mine so that I don't rush it. Same rules apply when cleaning them. Don't over spray the oil aka drown them.

*If you do need to clean your MAF you can buy CRC MAF cleaner - spray and let air dry / done-

Also the MAF is designed to get extremely hot to burn off and contaminants.

Armani

damn it. was gonna order my K&N's today. Now I want to wait to hear more people chime in. I've used them on previous cars of mint with no issue but I want to make sure I don't have any MORE issues with my 55

This topic has been discussed many times before and I thought the final word was that E55's do NOT have Mass Airflow Sensors. I just checked AllData and couldn't find it either. And I know this post is originally about a 63 engine but theres a few posts about 55's too. Just wanna clear this up

Installed K&N's a few weeks ago...no codes, no problems.

interesting. Are you sure?


Did you sun dry them 1st?

Nope. They weren't soaked in the filter oil though.

My K&N filters arrived Thursday, installed them on Friday.

Quality looks excellent. I did however place them in the oven at 170 degrees for 2 hours and then left them in the sun outside for the afternoon. Touched each side with a towel several times over the course of the day to remove the excess oil, they were pretty well oil saturated from the factory. Once the towel was clean (no pink spots) after touching both sides, installed them.

No codes and my car has never run better.

replaced my 06 c230 with a K&N air filter and the CEL came on this morning
is there a step by step to clearing the CEL?