I'm aware that the diagnostic gives much more data but I was posting what I had read is relevant to resolving the issue. It seems one sure problem is likely the R134a is low and the best way to solve that problem is to have it evacuated and refilled with precisely 1kg of refrigerant. So even though I've seen it it is not a good idea to top it off one's self?

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My Daily : 96 E-300 Diesel with 195,000 miles
Retired: 92 300D 2.5 T 345K miles and for sale
Retired: 95 E320 157K miles and currently parked with blown engine

Both retired cars are for sale as is my w124 shop inventory