Hi,
thanks for the explanation. You can express this in a conditional tag, in a similar manner as the maxweight on this example:
https://www.openstreetmap.org/way/87908429

charge = 3.55 EUR
charge:conditional = 	8.95 EUR @ ((axles=2 OR axles=3) AND height > 2.2);12.55 EUR @ ((axles>=4) AND height > 2.2);
