NEW acquisition 2008 C70 T5

[pdr1966sc]

OK took the dive today even though I am in the midst/yet nearly done refreshing a V70R ( some would say an R is never done..)
Anyways
This C70 has 200k kms on it, some scuffs and leather needing help but runs drives all ok.
Will soon need brakes, no biggy.
Curious - is it practical to upgrade to the Dyn.... audio system?
Will be removing tint, and tail light tints and starting to go over things.

Does this car have a siren module like the V70's which is likely near end of life for its battery - pull out and refresh before is eats up the PCB and drains the main battery....

Any C70 specific suggestions from the group here?

Peter