I was able to borrow a gauge and this is what I now have. At ambient temperature of 83 today with engine on an ac running set at lowest temp both sides and fan on max:

low side: 80
high side: 210
engine above idle low side 70

Any ideas what this means???

Thanks Rod

A little late on this, but I saw a great youtube video going through these scenerios diagnosing the A/C - type in Scott Kilmer A/C and it should come up. He goes over the different pressure readings and what is the culprit.

Pabster

Not late for me I borrowed gauges but can't find where to hook up the high side . Thanks.

__________________
What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

High side port is under a little door in the radiator housing area - also driver's side(left)..

__________________
Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
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'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles