W203 audio - fiber optic?

[hairboy]

Hi guys

I've been looking to replace my Audio 20 on my 2006 W203 estate for the past week or so, and kind of decided on the headunit.

Then I rang a few shops to enquire about the connector kit, but was told that it will have fiber optic system, so it will be a big job, and not a straight swap. From what I've read on here and other forums, fiber optic cabling is used on Bose upgrade between the Audio 20 and an external Bose amp. Am I correct?
The speaker grilles are all plain, and can't seem to see any Bose logo anywhere on the car, so I'm assuming I don't have this option. But just in case, where would the Bose amp be if I did have it?

Thanks

 

[zenman63]

Just take the unit out and you will see the fibre optic wires if fitted.
The new unit will need a canbus interface to work.
Whats up with the audio 20?
If its a nice motor why not fit the ntg 2.5?

 

[hairboy]

I could do, but I wanted to find out if there are ways of finding out without taking the dash all apart - with a 4 months old baby, I don't get as much free time as i would like.

NTG2.5 seems pretty nice, but a bit on expensive side, with unit costing £500-600 on ebay, and another £200 fitting at comand.co.uk The units I am looking at are in the £300-400 region, so half the price, and can connect my iPhone 4S for app mode i.e. free and up to date sat nav/traffic info with Waze, too. If it is fiber optic, is Canbus adaptor the only extra thing to be able to fit other aftermarket HU?