Hi there,
There's no MAF sensor in a location you expect it to be, which is on the air intake tube, somewhere between air filter and throttle body. It is actually under intake manifold. You can see it just about, when you point flashlight there. It is positioned highly inconvenient, however it is possible to remove it and refit it without taking intake manifold off. Unless one was blessed with Hulk hands.
It is held by torx screw, forgot the size now, but little ratchet is all you need to remove it. Good luck.
Small edit. Here's an excellent thread about P2008 code.
https://www.volvoforums.org.uk/showthread.php?t=177657