My son wants a 600 in Germany/NL. Aircon options questions?

[G-A-R-Y]

I have the 680, my son in NL wants a 600, they are tall, I understand the bed goes the other way, how tall will it take?

Also it's a bit warmer there, does the 600 come with aircon option or does the roof not take the weight. He has only C1 licence so can't go over 3500kgs.