Auto Hold Assist MK100 ABS module long coding 8S0 907 379 F (e.g. Audi TT MK3)

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Here's how to enable hold assist on a MK100 ABS controller, for example PN 8S0 907 379 in an Audi TT 8S/FV

ABS Module 03 Long Coding
Byte 15: Set bit 3 (Usually 06=>0E)
Byte 16: Set bit 7 (Usually 33=>B3)
Byte 25: Set bit 4 (Usually 60=>70)
Byte 26: Set bit 0 (Usually CC=>CD)

ABS Module 03 Adaptation
Security access: 20103
Adaptation: IDE05263-AUTO HOLD functionality => activated

Note:
You will need to install and wire in the auto hold button and new parking brake switch.


From some research the long coding for this module seems to be made up roughly as follows...
Byte 00: Unknown coding
Byte 01: 0xA9 + 11th VIN digit?
Byte 02: Unknown coding
Byte 03: 0x8D + 12th VIN digit?
Byte 04: Unknown coding
Byte 05: 0x99 + 13th VIN digit?
Byte 06: Unknown coding
Byte 07: 0xA9 + 14th VIN digit?
Byte 08: Unknown coding
Byte 09: 0x91 + 15th VIN digit?
Byte 10: Unknown coding
Byte 11: 0x54 + 16th VIN digit?
Byte 12: Unknown coding
Byte 13: 0x91 + 17th VIN digit?
Byte 14: Unknown coding
Byte 15: Bit 3 - Auto hold assist enable
Byte 16: Bit 7 - Auto hold assist enable
Byte 17: Reverse order of bits in byte 00
Byte 18: Reverse order of bits in byte 02
Byte 19: Reverse order of bits in byte 04
Byte 20: Reverse order of bits in byte 06
Byte 21: Reverse order of bits in byte 08
Byte 22: Reverse order of bits in byte 10
Byte 23: Reverse order of bits in byte 12
Byte 24: Reverse order of bits in byte 14
Byte 25: Reverse order of bits in byte 15
Bit 4 - Auto hold assist enable
Byte 26: Reverse order of bits in byte 16
Bit 0 - Auto hold assist enable