This is the infamous control servo. It varies the temperature and fan speed in response to changes in air temp and the setting of the temp wheel.

Do not mess with the individual vacuum hoses - there is a screw that removes the fitting that connects them all.

Do yourself a favor. Before you put it in, email george_murphy@compuserve.com. Pay him five bucks and get a copy of his troubleshooting guide so you can bench-test it to be sure it works.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe