Listen dickweed, when benz went to the 211 chassis they incorporated the filters into the engine cover. If the cover isn't placed correctly on the MAF it causes exactly this complaint.I think if you're going to give advice you should at least get your **** straight.

 

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For what it is worth.

MAF installation is a function of Engine rather than Chassis type.
e.g. R170 4 cyl is totally different to M112 V6.

Stuart

 

My responce was to post 5 Brndnb02 he has the 02 model which does not have the incorporated filter,and in either cars a leak to the intake side of the maf is not going to cause rough idle coming to a stop or hesitation on taking off without throwing a cel,in the other case he has a 210 model with a misfire code in one cylinder,wet plug,again not the maf,so go back to wyotek and study up..Guys like you are why they call it the stealership
Loose engine cover,good one buddy!!!!!!!!!!the key words in his post are intermittent(at times)no cel, no p0110 code all indicative of a loose cover i.e. the problem would be constant and would throw the above codes.
Just for laughs,how much do you guys rip a customer off for to run a scan of the OBD and r/r a maf ,if you can be honest about it?

And BTW my **** is perfectly straight,if you work for a dealer it is yours that is Crooked!

 

If you look, I replied to the original post, 2004 E320. As far as codes go, this doesn't leave a code, it creates turbulance around the sensor. The problem doesact as intermittant.
Not all dealers are crooked, I charge 1/2 hour when someone comes in with a bad MAF, I'venever seen code p0110, not to say it doesn't exist, but it doesn't ring a bell. I'm really not trying to slam you, but it really doesn't sound like you've got your facts straight. I just don't want this guy to waste his money if the air filter housing or seal is not installed on his engine correctly (On his 2004 E320). If it's ok then there's no money lost, so before the codes or sparkplugs or fuel pressure or gremlins, I would honestly check the fit, then you can get creative and throw money at it.

You know, I look at this forum occassionally and I wonder about how code happy everyone is, sometimes I try to help, sometimes people appreciate it, butit'salways the armchair mechanics who do all the griping and complaining. So when I give a suggestion that's free and some code addict whines, all I can do is say I tried.

 

Snanceki, I understand what your saying, but for example a M112 v6 in a 2001(210)E Class has a much different MAF install then a M112 v6 in a 2001(203)C Class. In this case chassis does dictate the installation.I'm just sayingwith the newer model E Class(211), they moved the filters into the housing and put the sensor on the rear of the engine, pointing up, and elbowed it off the throttle housing.

 

Hi Laterthatsameday,
I accept your point.
I was merely trying to demonstrate that the engine was as much a consideration in the type of MAF installation as the model type. I should have said "BOTH" Engine and Model.

I'm interested in your reply (to whoever) re "How Code Happy everybody is".

Do I assume correctly that reading and, as necessary, resetting codes is not a standard first step in your place of work?
If I am correct in thinking this why do you omit this simple and quick first step? It takes the whole of 2 minutes on an OBDII compliant vehicle using many handheld scanners.
I appreciate some faults have very characteristic signatures without the need to refer to the codes however the ECU memory (IMHO) should still recorded and wiped as a matter of good practice. This will help in understanding whether the fault has really been corrected since the memory should remain clear after test.

I agree codes are only indicative of what is wrong but are a useful starting point when customers aren't very good at "Problem Definition".
If there are no codes set it certainly rules out a whole heap of possibilities.

Are you actually MB trained? If so do you have any DETAILED info on the 2000 onwards fuelling system. e.g. System Operation, Logic tree, Component electrical spec, system thresholds. I'm not refering to general low level schematic stuff but "Design Level Stuff".

For example.
1. At "startup" exactly what electrical circuit checks are undertaken and how is Pass / Fail subsequently determined.
2. How often is LTFT updated and what averaging/reset scenario is used.
3. Why does an intermittent CPS not trigger a code (since during an episode no CPS signal will be present) and I would have expected this to at least trigger a general "Plausibility" code in the ECU logic. i.e. Engine revs, ignition on, no CPS signal..

Stuart

 

my 04 e320 just experiencing the same problem after I reinstalled the air filter assembly - rough idling at stop lights. after reading laterthesameday's suggestion, I opened up the hood and just found out the air filter assy was not pushed down. thanks Joseph Doll.