I am putting a new dash assembly on my 300SDL, while off I am going to install the vac. lines for the euro lamps & adujusters, and I am going to install a 4 place seat pkg from 560SEL I purchased, and need to install the wiring for the new heated & ortho seats in front and the individual power seating in the rear. I am wanting to know what else I need to look at or upgrade & or repair while its all apart. I was told that my evaporator had a leak as I keep having to recharge the a/c,guess I will need to put some dye into the system to verify. Everything seemed to blow out the apporpriate vent as set, but wanted to know what I need to look for specifically, before I put it all back to gether once its apart. Thanks in advance.

__________________
Mercedes Fleet:
2004 CL600 Designo Espresso SPORT
2004 S600 Designo Espresso SPORT/Lorinser Pkg.
1999 S320
1988 300TE
1972 280SEL 4.5
Diesel Fleet:
2014 GL350 Blutec
1987 300SDL Blk/Blk 4 place seating #18 head
1987 300SDL Smk Slv/Burgangy #17 head
1986 300SDL Blk Pearl/Palomino #14 head w/ 280K
1984 Lincoln Mark VII Fact BMW Turbo Diesel