Air mass meter for the Mercedes A-Class (W168)
Most airmassmeters are very simple to install. You just remove it from the air tube. Not the air mass meter for the W168 however!
What can only be described as an engineering stupidity, is the integration of the airflow sensor into the ECU. In case the air mass sensor breaks, the entire ECU must be replaced. The cost for this easily exceeds €1000 and more. Mercedes realized how many problems this caused, and used the regular system in the new W169. That doesn’t help the owners of the old W168 A140, A160 and A190 though.
Another problem is that you can’t replace your ECU with a second-hand one. It has to be new because once the ECU has been programmed it is near impossible to change it.
The A-Class' ECU with an integrated MAF sensor
There are two (cheaper) solutions than replacing the ECU with a new one:
Cleaning the MAF sensor – You can try to clean the air mass meter sensor. As we have previously discussed this topic, this is only a temporary solution though.
Repairing the air mass meter - This is what we recommend. There are some firms (mostly in Germany), that repair the sensor inside the ECU by replacing it. Besides being a lot cheaper (€300-400), you also save some time & money because unlike a new ECU, it doesn’t have to programmed for your car.
If anyone can recommend a good repair company that offers repairs of the air mass sensor of the Mercedes-Benz A140, A160 and A190, I’ll be happy to link to it.
Friday, January 28th, 2011 @ 2:12 pm 
Mercedes-Benz
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February 18th, 2011 at 8:40 pm
Coba ganti ecm second.