I don't remember exactly because this was more than a year ago. I filled it up through the low side port above the driver's side fender (on a 190e) with a R134 adapter and hose/gauge. The gauge had numbers on it but it was split up into a green, yellow and red section. I filled it up right up to the line between the green and yellow section. I think thats around 40psi.
Quote:
Originally Posted by hs_300e
On my 300E, I bridged the terminals of the temperature sensor connector and got the aux fan to run at high speed. I made a significant difference to the A/C performance and also helped keep the engine temperature down around 85deg.
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This is actually similar to what I did on my 2.6 which has 2 side by side auxiliary fans which are much more powerful than single aux fan on the 2.3. If the 300se has a similar 2 aux fan setup, I would give the switch idea a try first.