Air Mass Meter Problem After Replacement

[MrPoz]

I have just replaced the air mass meter on my s500l it is a 2000 (x)

The replacement came about after my local dealer cleared some old faults on the diagnostics and spotted a current fault with the meter

The dealer quoted me £340 for the part and £160 for the labour, of course i didnt let them have the job at that price so i bought the meter form a local parts supplier at £146 for the original bosche part

My brother is a mechanic with 20 years experience under his belt so he has the knowlege with diagnostics so replaced it and cleared the faults... all seemed fine for a few miles but has now became very lumpy on start up and extremely jumpy under acceleration (almost dangerous i would say!) and the check engine light is back on

Could this be a faulty part or are we missing something that needs resetting?

Please help....

 

[BlackC55]

Sounds like a faulty air mass again.
What are the new codes?

 

[MrPoz]

Havent got it back on the diagnostics yet...

Do you see many faulty brand new meters?

 

[jibcl500]

Did you buy the Meter from a Bosch center? Does the meter have the word Bosch on it and is the box Bosch or other? If it doesnt have the word Bosch then it isnt genuine its a fake from china and in most cases they r7un worse than a failed MAF.

jib

 

[MrPoz]

Definately a bosch part from a trusted parts suppliers

I know the guy that sold me it so wouldnt be a cheap copy

 

[jibcl500]

So does it have the words Bosch on it and did it come in a Bosch or Mercedes box.

jib

 

[MrPoz]

has bosch on the part

 

[jibcl500]

AND if it came in a box with TARGET on it then thats nuff said.

jib

 

[MrPoz]

I didnt ask for an interigation on who made it...

Thanks for the information... do you have any useful information now?!

 

[jibcl500]

well it could be a faulty meter, anythings possible. Will have to see what codes are later.

jib

 

[MrPoz]

Is an air mass fault code, have put the old one back on and parts supplier getting another for Tuesday

 

[Merc Tech]

You need to get the ecu reset. This is so that the vvt etc can relearn the correct values and not the ones from the faulty ecu

 

[MrPoz]

Was a faulty air mass meter

New one now on and running like a dream

 

[jibcl500]

Good that its now sorted.

jib