I cleaned my interior coil a couple of years ago. I did not remove the coil. If you remove the glove box and the panel below the glove box you can then loosen up the plastic case or the blower(I do not remember exactly) and vacuum the fins of the radiator on the intake side. It was a while back but I did find the info here on NICO.
I think I used this
http://www.q45.org/cleanevap.html as a guide but the Q is not exactly the same
J30 Drawings
Modified by Gerardjg at 2:02 PM 11/29/2007
Modified by Gerardjg at 2:22 PM 11/29/2007
Modified by Gerardjg at 3:48 PM 11/29/2007