Slkboi2000
9/30/2006 4:52:00 PM
Anyone have a link to a online maintenance schedule for a 2000 slk 230, have 70,000 miles on mine and haven't done anything except strictly oil changes and topping off fluids every 10,000 miles, did the air filter at 35,000 miles and replacing my MAFS today, I was told by several mechanics that cleaning the MAFS is just a temporary fix and that the check engine light will come right back on in a few months. What cause the MAFS to go bad so soon?...I was told if I changed my air filter every 20,000 miles that the MAFS will probably last forever.
snanceki
10/1/2006 12:39:51 AM
Why did you change the MAF? 35k is an unusually low mileage for failure.
The MAF "fails" (at least when signalled by fault Code P0170/3) as a consequence of "deposits" adversely effecting the temp/resistance curce of the hot film sensor. The "base" setting of this resistance is checked as part of startup checks and if outside limits sets the CEL. Prior to setting the CEL the vehicle begins to increasingly run lean causing intermittent misfire possibly on just one or two cylinders.
A burn off cycle used to be used on the old hot wire sensors but I think that the technology change precludes this. Either way deposits build up..
Cleaning can permanently remove these deposits (very sensitive to cleaner used) but sometimes cleaning does not work.
Not sure if town running is any different to the open country from a deposit point of view.
The proposition re filter changing is interesting and may have some validity but I suspect it is caused by particles smaller than the filter is design/capable of removing.
Slkboi2000
10/2/2006 12:46:23 AM
Did the air filter at 35K, did the MAFS yesterday at 70K, any idea where I can get a complete listing of maintenence of a 2000 SLK 230
snanceki
10/2/2006 1:23:54 AM
Send me a Private message with yor email and I will email you the (UK) schedule.
Stuart
DesignoSLK
10/2/2006 11:24:14 AM
quote:
ORIGINAL: Slkboi2000
I was told by several mechanics that cleaning the MAFS is just a temporary fix and that the check engine light will come right back on in a few months.
This statement is a load of "we-want-your-money" BS!
I'm sorry if I sound like a kill-joy. I know you probably spend a good chunk of change on your MAFS. Next time, do yourself a huge favor and consult the forum before you let your mechanic perform a colonoscopy on you.
