I failed to access a Mercedes 2006 SLK 350 R171 with vxdiag vcx se Benz DAS software. Tried another 5 cars, all no luck.
Error: Initialization of Diagnosis Multiplexer Failed
You have got the wrong VCI setting so it will not connect with any cars.
Don’t set vcx se as SDConnect, set it as C6 VCI.
Run ConfigAssist on desktop, configure device as 1 XENTRY Diagnosis VCI, then close the ConfigAssist
After configuration, DAS will cumminicate with R171 without problem.