As Check indicated - not much to it. The following discusses an A/C issue on 126 cars. There's some info in this post that discusses glove box removal.

http://business.baylor.edu/Richard_Easley//autofaqs/recirc.htm

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"