Session prep
Ignition sequencing matters on ignition-gateway architectures.
Wake CAN segments deliberately before requesting seeds.
Disable aggressive firewall VPNs on workshop laptops — TLS needs outbound access during checkout.
Typical Audi bay flow
Establish gateway routing if multiplexed.
Enter ECU-specific security routine.
Extract offline challenge / QR.
Purchase token via sfdcode.
Write unlock response.
Verify coding-adaptations menus unlocked.
Documentation
Print/email receipts into dealer-grade folders.
Customers increasingly ask for proof when leasing returns loom.
Attach token artefacts when escalating OEM tickets.
FAQ
- Any Audi-only quirks?
- Most quirks stem from gateway forwarding delays — retry challenge reads calmly.
- RS models?
- Performance trims still use VAG ECUs — generation identification remains mandatory.