Alan’s experience of being charged at Class 3 for just a centimetre or two over 3 metre height limit, illustrates a disproportionate “punishment” by arbitrarily applying this height rule. It’s so unfair.
One way to defeat this unfair ruling would be to affix a cheap, maybe even non-working, chunky and obvious radio/tv aerial glued to the roof, which would then introduce the rule that roof accessories should not be applied to the overall height. Similar to this I spotted… https://tinyurl.com/y8l5gxst
If charged at a Classe 3 rate, your objection would oblige the operator to actually look at his camera and SEE a tiny motorhome, entirely consistent with a fair “Classe 2” charge.
You do not need to even argue with the operator in a case such as this… Just keep repeating “Classe Deux” and add “Antenne” if necessary; that will work.
And it will save you the cost of the antenna in just one or two saved tolls, the difference between Class 2 and Class 3.