I'm in the process of ordering a new 4.2 V8 Premium & Technology Packeged Q7 but, there's very little information about colors. I've seen the Prelimary Order Guide here but, color descriptions/samples are non-existent.

What is "Pearl Effect" Phantom Black?
What color is "Expresso" same/similar as Amoretto?
What is the "Dashboard Beltline Trim"?
What are the various silver/grays? Light Silver Metallic, Quartz Gray, Lava Gray...?

Can I assume the interior color combinations very similar to the A6? ...meaning dash, headliner, seats and etc?

Also, will the car have a Bluetooth phone system? Tire Pressure Monitor? and when will the "S" Line Trim be available?

Bluetooth will be standard as well as Tire Pressure system.

For the S-line trim, if ever available, it might take another year or so.
Phantom Black is found on the new RS4.
It is a very dark metallic black; absolutely gorgeous. The 25th anniversary S4 actually has its grill painted in that color.

Expresso brown i think will be close to the Amaretto interior (Dark brown with black dash most likely)
Light silver is found on all Audis.
Quartz Gray is found on the A4 and A8/ A8L.
Lava Gray is found on the A3.

Yes the color combos will be pretty close to the A6.