On the 95 E300D I'm selling, the AC doesn't work. However, I have confirmed that the compressor engages when the low-pressured cut-off switch is jumpered. So that's a good sign.

I tried to add some refrigerant to see if I could get the compressor to engage. But, after almost a full 12 oz. can, it wouldn't. I saw a static low side pressure of about 70....but I gather that's a meaningless number.

Should I try to add another can? Or is that risky?

I know that the proper way to see what's going on is to evacuate and recharge the system. However, I'm not willing to spend money on getting the AC diagnosed....I will leave that to the new owner.

Thanks.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife