Driving a 3.5t van to Germany

[c1223]

Been driving vans for over 5 years and have driven a car in France, but never been abroad in a van. I believe I'm being thrown on the Eurotunnel to Calais and the route from there looks like heading through Belgium and straight into Germany around Cologne.

Any top tips or pointers from your past experiences? I know that the Germans and French are quite strict about having warning triangles and hi-vis etc...