I have the same issue on a 97 E300D with 110k miles.
Outside temp this morning was about 95 - 100F.
I am assuming all readings are in C. and bar. I don't know how others have theirs in F. and PSI.
1. 42
2. 41
3. 43
4. 42
5. 42
6. 74
7. 9
8. 43

My EC light was forced on.
Codes b1419, b1231, b1241

I did the EC over ride and cleared the faults.
My b1419 is stuck and can't be reset. I think the b1241 must of forced the EC light on to shut down the compressor. I can't recharge the system as I can't get the compressor on.

The system was cooling just fine here in AZ with 110deg ambient, but the car was doing the hissing, which I now know indicates a low fill situation.

Does B1419 force the 12 vdc off?
Or does it mean 12 vdc is applied and it's not turning on.
Is there an easier place to apply the 12 vdc other than the compressor. Like at the other end of the connector?
If I can't reset the 419 from the climate control unit, can you reset it from the OBDII connector?

I am driving this car from Tucson to PHX in a moment, so I won't be able to put a meter on it until tomorrow morning when things cool off.

Would putting a hair dryer on my 134 refg bottle help get the contents inside the system? I would think probably a waste of time as now the system is static,(not compressing) and has 9 bar. which is about 130psi.
With this static pressure I was able to clear b1241

Bill