Not easy to get to, but you can adjust the ETR through the glovebox opening with a carburetor adjustment tool.

I charged the system with R-12 using the sightglass method and was rewarded with 40 psi on the suction side @ idle and about 10 psi at 2500 rpm. Vent temps were 49° and steady on a 70°F day with 45% humidity, which is within the spec according to the climate control manual.

A slight adjustment to the ETR brought the vent temps down to 37°F under the same ambient temperature conditions.

Hope this helps...Robert

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership