Greetings! I would like to completely renew the equipment with my S204 C200 CDI 130 HP (BJ 2007). Background is that there was a workshop a year ago, which then forgot to vent the system, but did not tell me this, and then the next day at 4 o’clock in the morning in Italy (holiday drive) at the gas station had to “solve” the problem. I have cleaned up water. Was there in Italy also still in a Mercedes workshop, and there was correct follow-up still I have a bad feeling in my stomach, also the color (=brownish red?) does not quite match what it should be according to forums, even if there are many different ones as far as I know. Also, the remedy is probably old, since the workshop at that time has re-filled the old one. There should be an exhaust screw, under the underrun protection. But how do I get the air out of the system again? Is a vacuum device necessary? Then I would have to buy a compressor extra for it, which I don’t necessarily want. Is the heating on engine enough to warm up leaving lid open method out here, or is vacuum necessary? I’m looking forward to the answers, LG