WHich connection is LOW pressure side of A/C on 88 300SE
I need to add some 134 with red dye to assist in locating a leak. Can someone tell me which connection on my 88 300SE is the low pressure side? I want to avoid exposions in my garage (and face)! My car was converted to 134 by prior owner. I see one connection on the driver's side on top of an easily accessed hose, so I asusme this could not possible be it. There is another connection that would be a bear to reach right down by the compressor so my guess it that's the one. I just don't want to guess.