ColorMFA

When ColorMFA is active, can you still access all ECUs with VCDS?
Or do you have to shutdown ColorMFA when connecting VCDS? - If so, how?

You can use VCDS in parallel. No need to do anything in addition.(This means that you don't run any diagnostic thru COLORMFA in the same time when VCDS is connected!)

Yes, all right.
Not possible use diagnostics in same time (connect to ECU from ColorMFA and connect to ECU from VCDS). But ColorMFA not use diagnostics for get any value and connected to ECU only if you use this function in menu. Until you not connected to any ECU you may use VCDS in any time.

P.S. Some ECUs with diagnostics via CAN-bus supported 2 connection at same time, also possible connect to different ECU from different sources (ColorMFA and VCDS). But need check this only in your car. And only with diagnostics via CAN-bus. K-line not support this feature.

Thanks! That's all i wanted to know