I've got the 1986-1993 manual so I'm not sure whether that's what you are calling 2nd generation.
You don't need to remove the instrument fascia to get the head unit out but there is a special tool (P/N 49 D066 801) which is a pair of U-shaped prongs that fit into small holes on the front of the unit - you could probably make one as the prongs just release small tabs when you hold them apart.
This will give you access to the plugs and wiring at the rear of the unit.
