Last year I bought an Omega B 2.0 16 V EZ 07/97 and was enthusiastic until a few weeks ago. Then the MKL went on once in a while, the FOH meant “without meaning”. A few days later the needle of the DZM started to bounce back and forth, MKL went back, Omega out, moment waited, started everything again ok. Again a few days later the MKL remained permanently, but I can’t say that there was an emergency. run program was activated. Everything “feeled” normal. Error code read out: 0100, 0130, 0340. At the beginning of this week the Omega was then on a comfortable highway ride, about 120 km/h then hot, boiled over, and I thought already, that was it, ZKD ade. Towing up to home and looking for faults. But: no CO2 in the Kühsystem, no oil in the water, no oil loss and the joke, after I put now only water into ́s cooling system (very little frost protection) the Kühsystem works In plain language: after reaching about 97 degrees, the fans are on, (both stages one after the other), when the automatic air conditioning system is switched on, the temperature is immediately reduced. Now my questions to the experts: If the error codes have any effect on the cooling system and it may be that too much frost protection in the cooling system possibly influences the solenoid valve or something else, which leads to this. can the omega run hot (on the BAB). Then I want to rinse the whole cooling system again, here the question, is there a drain device on one of the two coolers ?