So just to put a bit of order in the VW jungle world.
So first off, there can be at least 30 control units in the car depending on the extras installed like side assist , electric seat, Harmon Kardon, ecc.
So all these units have their own software which can be updated only by VW. So as an example my Kessy unit had sw 703 and now after the update from VW it went to 706 which fixed the problems I had with unlocking by hand detection. You need to understand that all these units communicate with the BCM, the infotainment and also with each other and this is where many problems arise. They have rewritten the whole software from scratch with the Golf 8 so unfortunately we have become their beta testers...
Also different cars will have different sets of problems because A) Difective from Factory B) Different Software versions C) Control modules installed based on Optionals, ecc.
Now for the Infotainment Sw version, the workshop will only update to 1668 if the Vin of the car is approved by VW in Erwin. The workshop has to follow by the letter what VW Germany tell them to do because the warranty work is paid by VW to those workshops.
If you want to see the information of your car , like what modules you have and their software versions you can use Obd11 or Vcds. Make a scan of the electronic system of the car before and after updates applied by VW and you will know.
The Golf 8 update system is not like the ID3 unfortunately so only minor fixes in the infotainment can be done online. For the big updates only the VW workshops are authorised to do them.
For the Travel assist errors , the steering wheel swap solves most of the problems and some others with software updates.
About the Infotainment Updates: for those on software 16xx the latest is 1668 but a newer 1670 will be available soon.
For the 1778 with 816D Pro / 820D Media a newer 1803 is on the horizon so I heard
P.S. anyone with Golf 8 Gti who has a scan , I would like a copy without the vin, Thanks. I love that heartbeat effect on the Ignition button