motox

Having never owned a turbo powered vehicle, I'm completely green to anything turbo related and only have a general understand of how they work. I'm not entirely green on working on my own cars and replacing/diagnosing failed parts but this 2015 CS is the first.

Any additional maintenance or preventative measures needed?
Cleaning of radiators, ducts required? Greasing?

Any readings I need to keep an eye on? What to look out for and where I could find them?

Sounds. What are some sounds that would be considered problematic? Should there be a whistling sort of sound normally?

VarioSpam

PDCC pump seems to be a common noise source. Mine used to just vibrate. After replacement I'm pretty sure it is the reason for whirring noise, which is louder than the engine (when sitting in driver's seat, RHD). Seems to be "normal".. Other threads about that and a whole forum about maintenance!

Tappet

I've only had my 2017 CTT for a few months, but it's like most any turbo engine, just bigger. I've owned other turbo cars before and the key things to keep in mind are to stay on top of oil changes, because turbos are harsh on oil due to the heat, and address turbo issues promptly, you don't want it grenading into the engine. The bigger things with these cars is going to be the carbon buildup on the intake valves. All direct injected engines slowly foul the valves, but turbos do it faster there's more blow-by in the cylinders and so, more gunk going into EGR, and that fouls the intake valves. There's really nothing you can do here, other than to have the valves cleaned once they get bad.

lml999

Keep the radar detector firmware updated.

RAudi Driver

Toreador

After hard driving, the turbos will be very hot, so don't just park and shut off the engine. Let it idle for a bit to have the oil circulate and cool them down before you turn off the car

snikwad

Its harder on fluids in my opinion.
between the turbos running the oil pretty hot and the PDCC working to make that 5k lbs thng defy physics laws.
Additionally, if you have PTV+ that thing needs frequent fluid changes along with your transfer case, since its just under 1L to cool and lube and protect those multi disc clutch packs.