outside temp sender& exhauste

[paletzki@codon.nih.gov (Ronald Paletzki)]

I have two questions for the list concerning my  89 100 (5spd) with the
automatic climate control.  For the last 3 months the outside temp always
reads 20 to 30F lower then the actual temp. Any suggestions on what to test
or replace?

Also the muffler is beginning to wear out so what are my options.  I would
be interested in upgrading to a higher performance exhaust, but I am also
looking for an exhaust that will last and is not to loud.  How do these
compare to the OEM/Audi exhaust?  Any suggestions would be great. Thanks