Use this article if…
- MK4, Bluetooth / CarPlay / Android Auto won’t pair or start (broad phone link failures - start here).
- First-time CarPlay never finishes initial setup → CarPlay first connect.
- Wireless CarPlay drops mid-drive → CarPlay disconnects. Android only → Android Auto won’t connect.
- iPhone Wi‑Fi vs Starlink/camp router → CarPlay vs Wi‑Fi. Maps need data → Internet on MK4.
Quick answer
Phone connection problems clear fastest by deleting the MK4 from Bluetooth and from CarPlay/Android Auto on the phone, rebooting both devices, and pairing again from the MK4 wizard with a known-good data cable.
Problem
- Phone will not pair, or CarPlay / Android Auto / Bluetooth fails to start or stay connected.
Symptoms
- Bluetooth never finishes pairing or drops straight away.
- CarPlay / AA stuck on connecting.
- Calls work; apps will not project.
- USB works; wireless does not (or the reverse).
Cause
- Stale pairing after reinstall or big phone update.
- Phone permissions blocked.
- Charge-only cable or worn USB port.
- Battery saver killing BT / Wi-Fi.
- Too many BT devices in the cab.
- Headunit firmware may need a PVS update for your phone generation.
Fix Step-by-step
- Delete MK4 from the phone BT list and from CarPlay / AA car lists; reboot phone and headunit; pair again from MK4 menus.
- Approve contacts / notifications when prompted.
- Use a known data USB cable straight into the MK4 - no cheap extension.
- Android: turn off battery optimisation for AA and Bluetooth.
- iPhone: remove the car under Settings → General → CarPlay; rediscover.
- Turn off extra BT gadgets for one test drive.
Notes
- First-time CarPlay: CarPlay first connect
- Wireless: Wireless CP/AA dropping, CarPlay disconnects
- AA only: Android Auto not connecting
- BT silent: Bluetooth pairs, no audio
- Data: No internet on MK4
- Firmware pathway: MK4 firmware & updates (PVS)
Firmware & updates (quick)
- Check build: Settings → System → About device / About tablet (labels vary), screenshot build number for emails.
- When it’s relevant: After PVS gives you a package, or projection still fails after cable + forget/repair + stable power - not before. Full steps: MK4 firmware & updates.
- Safe rules: PVS-supplied files only; strong battery; don’t unplug USB during progress.
- Stop - contact PVS: Unofficial flash, boot loop after update, burning smell, or brick.