I did nearly 800 miles last autumn on trip to Disneyland, absolutely no issues either with the car or the French roads (Paris suburbs excepted!!). Mine had nearly 199k on the clock at the time and without pushing it hard it still did the 300 miles from Roscoff to Paris in 4 hours.
Coming home, due to an accident on the A12, we had about an hour to do the last 145km to Le Havre and made it just
These cars are built for doing long distance trips in comfort.
Just make sure you have the required travel kit, a reasonable selection of tools, service it prior to traveling and you should be fine.
