it is quite shitty to change that part.you are supposed to come out with the dash to get it done..i have taken mine out as the hose connectors broke when i got the engine out..and it was actually fucked in the mesh aswell...so..
but i have just loosend the whole air box in the car..which the heater matrix fits in..i have loosend it yeah.(without takin the dash out..and got it as far back from the chassis front wall as possible..but i havent mounted the new one yet...cause i think there will be some clearance problems since the new one obviously has the hose connectors intact.doooh
i will try and mount this as soon as possible ,next week maybe.
cheers mate