1987 300sdl. Can any one tell me what the Low and High pressure should be using the 134a freon? Thanks in advance. Jack

As it didn't come with 134a, the charts aren't quit right. Figure that you can add about 10% on the high side if necessary, and keep the low side about where it would be with R-12.

Could you post the chart on pressure please?

http://www.aircondition.com/pressure.htm

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EPA 609 & 608 HVAC Certified
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83' 300D Turbo - 300K + Miles
00' 1.9L TDI Beetle
85' 6.5L Turbo, GV-OD, GMC Suburban,
67' 2.5L Diesel NA - Land Rover Series IIA

Here's what you do if it's so cold your diesel fuel gels. Smear some on some toast and stay inside until it warms up outside.