Replaced dead MIB2 unit, now Full Link and Bluetooth vanished

[rockafeller]

Hi all,

I’ve found myself in a bit of a pickle and I’m hoping someone more experienced with MIB2 systems can point me in the right direction.

My original MIB2 head unit recently died completely, so I replaced it with a used unit of the exact same model:
5F0035877A - MIB STD2 ZR +/NAV.

Component Protection has now been removed and the unit has been coded to the car. Initially there was no sound, but after the CP removal/reprogramming, audio started working perfectly again.

Here’s where things got strange:

Right after getting the car back from the garage, everything seemed fine:

• Full Link worked
• Bluetooth worked
• Phone menu was available

I drove home with no issues.

However, after the car had been switched off for a few hours and fully powered down, I came back to:

• Full Link gone / asking for activation
• Bluetooth unavailable (“unable to switch on Bluetooth”)
• Phone menu completely missing

My guess is that after the unit had a proper shutdown/reboot cycle, it performed some kind of validation/licence/configuration checks and disabled features that aren’t properly activated/coded.

Does that sound plausible?

The garage that removed Component Protection told me they “don’t really deal with car audio/software activation stuff”, so they weren’t much help beyond getting the unit working.

I also contacted a SEAT dealer:

• £273 quoted for Full Link activation
• £140 just for initial diagnostics/assessment of the Bluetooth/phone issue (before any repair)

That seems pretty steep, especially since from what I’ve been reading this may simply be coding/adaptation or FEC/SWaP related — although I’m very open to being corrected here as I’m definitely not an expert.

At this point I’m trying to understand:

1. What exactly has happened here?
2. Is this likely just coding/adaptation?
3. Can Bluetooth/phone functionality be restored with OBDeleven/VCDS?
4. Is Full Link activation a completely separate issue?
5. What’s the most cost-effective way of getting everything working properly again without dealer pricing?

I even considered buying OBDeleven and trying to sort the Bluetooth/phone issue myself, since I’m reasonably confident with software/tech in general, but I’m not sure if this is realistically DIY territory or if I’m likely to make things worse.

Any advice would be massively appreciated.

 

[James_R]

Sounds like it needs the functions restoring on the infotainment system (address 005F) through the SWAP/FES function clearing system.

I'd take it somewhere where they have ODIS and know what they're doing with it.

It ideally needs a 005F software configuration carrying out then SWAP/FES on the same unit, that *should* permanently restore the lost functions.

Not really a DIY job as you need an online connection to the VWG servers.