What is Pro audio and Pro Nav? Newbie

[Kolobos]

Hi,
I'm about to purchase a Z4 around year 2015 and I'd like to know the specification difference between:

Pro Audio over standard (does pro have a subwoofer)?
Pro Nav over standard?

Any help much appreciated, thank you.

Steve.

 

[Kolobos]

Updated notifications

 

[ihadablackdog]

Pro audio has more speakers than standard and is the top option. It has subs behind the seats. There is a diagram somewhere that shows the different speakers in the different packs (standard, business and professional). Hopefully someone can help.

Not sure about the nav. I think on some models, not sure about Z4, the business nav had a smaller screen. Not sure what else was different.

 

[Kolobos]

Thank you for your response.

Steve.

 

[Anonymous]

Here you go....