You also want the M Sport Edition because it comes with the full-LCD cluster. I'm in the same area as you. They're hard to find.
Deep Sea/Carbon Black/Mediterranean Blue are all beautiful. I think Tanzanite might be an Individual color, so even rarer. For the interior, I love the Cognac/Black Bi-Color Nappa or Cinnamon. They go great with any dark blue exterior.
Mercedes COMMAND feels archaic compared to BMW iDrive or Audi MMI. They keep adding new features to it, but haven't simplified it (like BMW/Audi have)
I wouldn't buy one without CPO, but they should be fine (reliability wise), if you get the 640i.
IMO, the 6 Gran Coupé is best looking car in their lineup. Amazing road presence
We should see a new CLS soon because the E-Klassé just got redesigned. The screen placement in the current CLS looks awful.
I always felt the 6GC was about $15-20k too expensive. Almost $100k for a 6 cylinder model? Not worth buying new.
Yeah, I am looking at the M Sport Edition only anyway The CLS does just feel old inside.
Tanzanite is a BMW Individual color, so yes very rare. My other half likes the Frozen Bronze. It looks fantastic, but I am sure is a nightmare to care for.
As for CPO, does it really gain me much over just being <4 years old and under new car warranty still? I know it adds some warranty included, but other than that (which I can buy?) what does it gain me other than potentially a $5-10k hit in my bank account