Vel Satis a meaningful car for me?

Hello, I’m driving as you can see at my signature at the moment a Focus 1.8TDCi tournament. It now has 140,000km on the clock and the repertures are increasing enormously (climate compressor, magnetic coupler, electric window lifter, Lima, handbrake sensor) within the last 6 months and I want to separate myself from the car. Before that I had a 5 BMW and drove a lot of factory cars at Mercedes and appreciate the comfort of these cars. What does this look like at the Vel Satis? our Renault dealer doesn’t release this class of vehicles to people under 25 (even no used ones?!). Does the Vel Satis of uncomfortably rolling off and feathering approach these vehicles? As an engine I thought of a petrol engine, drive only 17-20,000km next year and often refuel in Austria, a diesel is no longer worth it after my bill (purchase price, tax, insurance, maintenance). What about the 2.0T? Recommended and about the highway (tempo 160-180) with 10 liters? How stable is the Vel Satis in general? Are there bigger problems besides the 3.0 diesel? A facelift is unfortunately not in there… Last but not least, does the Vel Satis have a cruise control as standard? Greeting Stefan