Your release notes says that the MK4 does not support male voices. But I tested this earlier (that was before your program was released, I send the command with I-Bus Analyzer) and GB male voice worked with my MK4. But I did not make a road trip and test if the soundfile actually is as complete as female voice. Filesizes are much smaller in male soundfiles vs. female soundfiles. Maybe you could still leave this option enabled for MK4 but with a warning/activation toggle.

Arrival time: is it always enabled with the MK4 or why it's not a valid setting for the MK4?

Male voice doesn't support all the TMC commands

The only thing the menu does is disable the control - you can code a Mk4 with the menu set to Mk3

rrival time: some people with Mk4 checked this box but found they lost arrival time display, so I disabled it for Mk4 :-)

kiwijoche if I allready code MK4 and lose Arrival Time, What I do?

Code it again.
Do not check 'Show arrival time'

Your nav should work

ok, thanks. I make it and write you.

Where can I purchase the cable ?
Not very technically minded to build it myself.

Thanks

Have you succeeded in understanding if the split succeeds in working with the BM24?

I have BM24 and the 4:3 display, splitscreen in all modes works perfectly

I have BM24 with 16:9 and the spleetscreen it doesn't work with the radio and the cd.
Also others that have 16:9 with BM24 have the same problem.