Newbie alert! - Question about retrofitting certain extras

[Neutro999]

Hi Guys

Newbie here with a couple questions. Ive had a quick hunt through the forums but can't see any topics for this so forgive me if this has already been mentioned/answered.

I've been debating getting a z4 for a while and hunted all the usual used car websites and trawled for a fair few years trying to find one with the right spec/colour/mileage/price but there is always something missing kit wise so now i'm thinking i may need to accept that i won't find a perfect one that has all my requirements :x

Basically I want to know what my options are for retro-fitting the following kit:
- Electric-fold exterior mirrors (really, really need/want this and hardly any cars especially 2.0i roadsters have it!!!)
- Bluetooth phone prep ( I read somewhere that U.S cars are already pre-wired for bmw cell/mobile phone kit, is this the same for U.K cars?)
- Hi-Fi Speaker System (10-speaker setup - NOT the carver pro one)
- Interior/exterior mirrors auto-dimming

Any help/advice much appreciated

Neutro999

 

[metal licker]

Hi Neutro999 welcome to the forum
Sorry can't help with the questions

 

[firebobby]

Hello and welcome.

 

[Scooba_Steve]

Welcome,

Retrofitting folding mirrors is possible but very expensive - doubt you will pick up any second hand.
Dimming is also possible but again expensive as I believe you need new units rather than just the glass.
No idea about Bluetooth pre-wiring but you can always fit an aftermarket head unit - I don't think mine looks too bad.
You can do the speakers but no sure about connecting to the OE head unit.

You should be more worried about springs and cruise control