Air Filter box help
 

Ijust bought a2004 A6 and this weekend I attempted to replace the air filter, that looks like it has been in the car since 2004. I can into a problem trying to reach the (L) back corner metal retaining clamp. The other three are easy, but thatfar back one is a str8 "Beast!" Oh, and I am no mechanic.[&o] Thanxz in advance for any assistance