Flat W210 320 c.d.i.

[sms78]

Every morning for the last 2 days on the commute to work ive noticed that my car has been performing weirdly . On the motorway it seems like its stuck in top gear or something and excellerates very slowly and wont kick down . The car doesnt do this at first is seems to happen after driving it for a hour or so .The strange thing is that after parking it up and leaving it for an hour or so it will perform normally all day . If anybody has any ideas what this could be i would be very gratefull .


Thanks .

 

[jberks]

Unless you've changed it in the last 12 months, get a new MAS from your local Bosch dealer.

 

[sms78]

flat w210 320 c.d.i

Many thanks, ill have a go and change that at the weekend . Cars been allright today bit of a stange problem that.

 

[television]

Thats the way they go, try an unplug it and see if it is better, as Jberks cheapest from bosch at £145

 

[sms78]

Cheers guys ill try that first might be a dirty connector or something . £145! BLIMEY! Also whereabouts is the mas sensor ?:Oops: I dont wanner go ham fisted in there and unplug something i shouldnt lol

 

[Parrot of Doom]

Next to the air filter box, on the big fat pipe. You'll see a wire heading into it. It'll be held in with 2 torx bolts.

You only need the insert (not the pipe section).

 

[maddog]

Mobilo life charged me £70 for genuine one when they changed mine about 18months back

 

[sms78]

Sorry to ask another question :Oops: but what is the difference between a "mas "and a "maf": or is the maf the sensor in the bottom of the air filter housing? Merc stuff seems to be called different things to other cars .

 

[television]

Sorry to ask another question :Oops: but what is the difference between a "mas "and a "maf": or is the maf the sensor in the bottom of the air filter housing? Merc stuff seems to be called different things to other cars .

Its the same thing, some say filter , others say sensor

 

[jberks]

Its the same thing, some say filter , others say sensor

They may say so - but it is a sensor. There's is no filter component to it.
I believe
MAF Mass Air Flow sensor
AMF Airflow Mass Sensor
MAS Mass Airflow Sensor

All the same gizmo though.

 

[stumpy]

My BMW uses 2 MAFs which cost approx 500 quid from BMW. They are Bosch items also used on VAG group cars. VW will supply new for old MAFs at a much reduced price, the only difference being the lack of a clip to hold the plug in place. Not sure if the same applies to Merc though but it might be worth investigating if any 'lesser' marques use the same items.

 

[maddog]

Went and got my old box

Part number A 611 094 00 48

Description - Air Mass sensor

Cost £66.62

http://www.mercedes-benz-parts.co.u...rtuemart&keyword=a6110940048&page=shop.browse

The Bosch sensor would have to be a lot better than the genuine one to make me pay £150 for it!!!

looks like this

 

[stumpy]

that is a bargain!

 

[sms78]

Cheers guys you have been a great help this site is brilliant! people know everything I phoned up german/swedish they want 38£ for a mas but its a pierburg not a bosch one . My local mercedes parts dept want 78£ but they dont know what make it is. Gonner go look at the one at merc dealership first and if its got pierburg written on it will go for one from german and swedish .I suppose its like everything else ya just paying for the name , pierburg or bosch probably does same thing .



Thanks ppl

 

[stumpy]

A word of warning. Some M5 owners I know have fitted non-bosch items and screwed up the performance of their engine.

 

[maddog]

The genuine one is made by Pierburg anyhow you can just make it out in the pic i posted

Please put the part number from German Swedish on this thread it may be useful for others