I believe that the unit is connected by a large round rubber hose to the Throttle actuator (which sits down on top of the intake manifold).

It shouldn't be that hard to get out - perhaps loosening a hose clamp would help - look carefully to see if that[s what's holding it in. If the hose is baked to the MAF, you could be in for a very painful removal. Make sure that you buy an extra hose (if that's what's connecting it to the TA) just in case you need to cut it free.

Troy
1995 E420 105k