Didnt you say the MOST is working but this is a coding issue?
It is unclear to me why you haven't tried swapping the gateway or the control head. Logically a phone module isn't going to have anything to do with the system not working after a coding stuff up. MOST parts darts doesn't sound to me like the way forward.
The gateway ECU controls everything with CAN. These are very cheap. I would replace it and begin again. You do you though
Mike
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04 A8 - 4.2 Sport
Indigo Leather Sports Seats - Sports wheel - Sports Air Suspension
Auto Boot - Double Glazing - AMI - Solar roof
TV - Bose - Voice Control - TPMS - AFS- TINT
Power Blind, Fingerprint - Light package (in and out)
Retrofits:
OEM Auto headlights & rain sensing wipers
OEM Bluetooth phone
Bluetooth Audio Streaming
Reverse Camera
OEM Aluminium Package
Auto boot close using remote/door button
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