1986 5KCS Turbo Repair Questions

["Lewis, Gary M" <Gary.Lewis@West.Boeing.com>]

I need some repair help.  Regarding my 86 5kcst 5sp:

1. I need a new Thermo Switch.  Looks easy to install, however any
BTDT's would be helpful.

2. The vacuum trunk release mech. stopped working last night.  I can
unlock it with the key, but I really like the auto unlock-lock door key
feature.  What's wrong and how do I fix it?

3. Lights (Sorry, I hate to do this)  I noticed at a parts web site they
had XENON headlight replacements.  Worth doing?  Also, they had Hella
bumper mounted driving lights for $70.  Worth doing?  (I know , I should
get Euro's, but I can't afford em' right now.  Like $1,000, right?).  

My wife and I were in the Audi at night and she commented that the
lights stunk.  This is pathetic 'cause my wife is automotive challenged,
and if she notices it's REALLY bad.  I told her the fix is a Euro
conversion for approx. $1,000.  Reply, "We're (read "you are") not
spending a $1,000 on lights for a $2,000 car."  I'm neither a complete
wimp nor an idiot; I immediately got her to agree to a 91 200Q or S4 in
a couple of years, after we get another house, as reward for me driving
this "old" car around to save money.  I'll never tell her the truth: I'm
lovin' it...

TIA
Gary, 
86 5kcst 5sp 193km