Yeah dpetryk, you interpreted it correctly.

When he leaves it running for a couple of hours after filling it with air at high pressure, there is no drop in pressure. After that he again fills it with R12 & only after the car has been running for a couple of days there is low freon.
Also after researching for a few days I understand that the best bet to increase cooling is to increase the airflow over the condensor i:e to have a better fan, correct me if I am wrong. what is the best fan available that will fit right in.
I know lots of questions, but I am really sweating.

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300CE 1989 Euro Model.
ML350 2011.