Here is what I found, and it worked.... MIB1 Fender amp works with MIB2 components.
Coding Tweaks Needed
-If you are installing this unit into a 2015 Golf/Golf R/E-Golf/Alltrack/GTI with the MIB1 and Fender Audio, you will need to tweak a setting to enable audio to work with the new Discover Pro.
-To begin make changes into the MIB2 with Vagcom
Manual entry into the GREEN Test Engineering menu to unlock VCDS Diagnosis:
You have to keep pressing the "MENU", until "Service Mode" appears, then press "Test Mode", then press "Green Engineering Menu". After entering the "Green Engineering Menu" to choose the right knob "Enable diagnosis for 10 next boot-ups," wait until you are "In next 10 boot-ups your diagnosis will be available" for out of this press the "nav" on the right side of the display. You must close access to diagnosis after coding is complete.
Enabling sound on 2015 vehicles with MIB1 and Fender Audio:
In module 47 in VCDS
1. Plug in VCDS - choose Module 47
2. Choose CODING.
3. Change byte 0 to 0x12 (Probably you have 0x22)
If Carplay does not work when the MIB2 Discover Pro is installed:
Enter 5F Information Electronics in VCDS
Enter Adaptation-10
Under "Channel 64B", select the channels listed below and make the following changes in the "New Value" Drop down.
IDE03471-ENG130249-Fahrzeugkonfiguration-Apple_DIO: change to "on"
IDE03471-ENG130248-Fahrzeugkonfiguration-Google_GAL: change to "ein"
IDE03471-ENG07590-Fahrzeugkonfiguration-Mirror_link,function_on_hmi_on: change to "on"
IDE10480-MAS10741-Schnittstelle für externen Medien: Aktivierung-Anschluss 1: change to "activated"
Press DO IT to save changes
If "Blue Trainer" parameters do not work correctly
Enabled the “Offroad” in VCDS in the 5F Information Electronics in VCDS. This will cause the accelerometer and steering angle measurements to work
To enable the PDC display if it does not display after the retrofit
You need to have the PDC settings for MIB in two different locations in the adaptation channels.
First the screens :
ENG122227-ENG117496-Car_Function_Adaptations_Gen2-menu_display_pdc,activated
ENG122227-ENG117500-Car_Function_Adaptations_Gen2-menu_display_pdc_after_disclaimer,not activated
ENG122227-ENG117497-Car_Function_Adaptations_Gen2-menu_display_pdc_clamp_15_off,not activated
ENG122227-ENG117498-Car_Function_Adaptations_Gen2-menu_display_pdc_over_threshold_high,activated
ENG122227-ENG117499-Car_Function_Adaptations_Gen2-menu_display_pdc_standstill,not activated
Then the activation :
ENG122229-ENG117710-Car_Function_List_BAP_Gen2-parking_assist_0x0A,activated
ENG122229-ENG117711-Car_Function_List_BAP_Gen2-parking_assist_0x0A_msg_bus,Terminal 15
