C205 C43 CR41R Security Access - Seed Accepted, Key Rejected

[p7eep7eus]

I'm trying to make changes to the variant coding in CR41R, but I can't get secure access. I'm hoping someone familiar with Bosch CR41R ECUs can point me in the right direction. I searched everywhere. I've been able to make changes that don't require secure access, such as flashing convenience from 3 to 5, but I'm trying to enable Last Mode start.


I have completed the request seed. Put this into the Seed Key Calculator using DLL CR41R. Then I paste the key into the send key and hit transmit. I keep getting the wrong key. I have an AMR tune, does this have any effect?
I can only take screenshots in the morning, it's too hot to go outside right now. If only it would help.
This is a 2017 C43.

 

[p7eep7eus]

It looks like I connected to the wrong control unit. Sooner or later, I'll figure this out. For some reason, XENTRY is just "hanging" and won't load. As soon as the battery charges up a bit, I'll try to figure out exactly which control unit is needed. Hopefully, I'll have better luck then. And yes, I've already double-checked everything everywhere.