Hello to all Vario drivers and connoisseurs of these vehicles. My question to you: I saw at a MB Vario 615D-KA from 2003 that there were NO pressure gauges for the compressed air display in the amature board. There are usually 2 round pressure displays under the tank and water temp. display. Does one of you know this version or specification? What is special about this braking system (advantages/disadvantages)? I would be grateful for all the information.