How to manually deploy KERS on 2D race viewer?

IK I'm a noob

Click the drivers' name at the bottom-left, then hold the KERS button.

OK thanks, I'll try it.

Of cours, u first have to Research KERS (level 6).
In 2D, there is a settings button. In settings u may deactive "Diver Controlles KERS".
Otherwise they use it on their own, too.

Been there, done that