whether the fuel map should be uploaded 98?
Per the owner's manual, "The 8.4L engine is designed to meet all emissions regulations and provide excellent fuel economy and performance when using high-quality premium unleaded gasoline with an octane rating of 91 or higher."
Note that the manual is referring to the US way of rating gasoline octane at the pump. USA 91 octane is equivalent to 95 RON at European pumps. USA 93 octane is equivalent to European specified 98 octane. Premium unleaded gasoline in the USA is typically 91 or 93 depending on the state. So, I think that the car should run just fine with Euro spec 98 octane.