Dot4 is for the clutch that doesn't require changing. However the transmission fluid needs to be changed every 40000 km. I got my vezel zero meter in 2016 and alhamdolillah have never experienced any issues at all. Yesterday went for 40k service and following was done.
Transmission oil changed, Brake oil flushed, Tappet (may have spelled wrong) adjustment, Engine oil change, oil filter change, fuel filter change (mine was clean so didn't change), air filter change (was not needed), Brake pads change (was not needed so only cleaned), Cat converter cleaned (wasn't needed). It took more than 5 hours for all this. Honda charges double price for the parts so anyone wanting to get 40k service may buy the required parts from market.