Lexus IS250 wiring

[TotalControl]

I have a close friend who is going to purchase an IS250 in the next week but wondered if the wiring loom on all models was the same behind the dash?

He wants to add a sat nav option onto it and was hoping it would be plug and play if an option to add it is there. If plugs exist already, he can just perform the install easily himself.

Any ideas chaps?

Edit - car is an 06 plate SE.

Edited by TotalControl on Saturday 29th March 10:00

[Heaveho]

Would just buy it and use a Garmin, the standard fit satnav will get you lost in a heartbeat, completely useless POS. It, and the completely BS rain sensitive wiper rubbish are the only 2 things that infuriate me on ours. Seriously, he's genuinely better off without it!