Mike: hi
As to your question about Traffic Information, this should be relatively easy to enable - it's just a matter of setting a software switch in one of the control modules in the car like THIS,
As to your question about Start Stop, you could buy a third party device like THIS, or you could make a simple device like THIS. But - given that you will need access to a diagnostic for the Traffic Management tweak, the easiest method would be to also use the cable to do THIS.
Don't be concerned that the information that I have provided relates to Golf mk7. Your Passat is built on a MQB platform - like the Golf and it therefore shares a similar CAN network topology making it likely that the same tweaks will be useable
Don
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