Hi there,
Congrats! Now that you have an operational vacuum system, click on the Unwired Tools ad at the top of the page and read all about their digital servo replacement upgrade kit, which replaces the mechanical servo completely, and installs a much cleaner microprocessor controlled climate control system in it's place. It's spendy, but gives the car a much more precise control of temperature, won't run your battery dead, like the mechanical servo can, etc... I installed one about a year ago, and it works GREAT! Much better than the mechanical setup, and a lot cleaner install. I installed my unit behind the glovebox, with the new heater valve outside, similar to the '82 and newer SL's.

__________________
Richard Wooldridge
'01 ML320
'82 300D 4.3L V6/T700R4 conversion
'82 380SL, '86 560SL engine/trans. installed
'79 450SL, digital servo update
'75 280C