I hate PzIVs

[GAZNZ]

Before you get angry and quit you need to realize that you need good spotting in CM and C2.
I usually have Hqs on foot with radio or recon vehicles spotting that are in the same C2 net work as my tanks.
Ie Tanks are under the group commander, who is radioed if there are enemy and there positions,
Tanks get spotted and relayed to my tank who position there tank's angles accordingly I''ve noted and spot them easier. This goes out over the radio network.
Buying a crack tank and expecting them to see is not how it works.
You have to understand a hidden AT gun can be hard for a tank to see. Even after repeat shots.
You need a good communication and spotting network.
I hope this helps your game and play style.
Command vehicles, recon and radios - the whole setup is not in the game for no reason.

I recommend Elite or Warrior for best settings.
IRON can create issues with moving and seeing your own units so I do not recommend its use.
I find IRON way overboard and unrealistic.