Mern, I too, have recently returned from taking the Jazz to France, and Spain. Absolutely no probs and it never skipped a beat.
Had two drives of 550 miles plus in a day. One from Bilbao to Alicante, and the other, Alicante to Auch (near Toulouse). Had to fill up twice in each day too!
Like the Arc d T, Auch has an 'old rules' roundabout too. They're getting quite rare now.
As regards beambenders, I always take them with me but never fit them. The Jazz and my previous car don't have any fitting indicators. It's never been a problem in nearly 30 years. Years ago, I used to fit yellow bulbs though.
TG for good air-con as the highest temp I saw was 32C!