Where do i put the refrigerant in and where is the high side and low side? on 1992 Mercedes-Benz 190E

is there a diagram to show me?

Asked by for the 1992 Mercedes-Benz 190E
2 answers
high side is usually the smaller tip low side most timesit lower neer the front of the car
The low side access port you will find is on the top and is more easily accesible. The High side is down inside closer to the ac compressor. Be warned you might need to convert from r12 to r134.