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.

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The MAF Shop has a new addition: The Pierburg air mass sensor 7.22684.07.0 which fits most Mercedes CDI engines and works even as a replacement for a few Land Rover / Range Rover air mass meters.

Pierburg Airmass meter 7.22684.07 for €74.90

The offer contains next to the sensor also an installation kit with the needed but hard to find torx bits.

By the way, I found this PDF containing some general info about the MAF itself: Pierburg PI 0024