Deactivating of 3RD Brake Lamp Warning

I've installed a strobe-relay for my 3rd brake light, and my old Daimler don't like it, so it comes up with a warning when I hit the brakes after start. Luckily I can hide the warning with the steering-wheel button and it don't show up after that when I hit the brakes.
I asked the MB Dealer, but they can't do it because of some safety issues....
sissies

Here is how it looks:
and of course make changes when I need it 
I see there is another device called CarSoft 7.4 out there much cheaper...Have you tried it out?....or anybody else? Does it have the same functions as the STAR?
I know I can get it cheaper from China, but have heard various things about the stuff they sell on aliexpress
I know I can get it cheaper from China, but have heard various things about the stuff they sell on aliexpress
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Will try it out, and come back with the results


