Takeo
This is my other team and has the same problem, can not keep up with DRS and KERS nv 12, even though everything is developed.
Did you buy the upgrades for boost and DRS in the tech facility, too? Because first you have to upgrade the facility and if that happened you have to buy the now available higher level boost and DRS upgrades in a consecutive step as well. Otherwise you'd be able to have boost and DRS on lvl 17 but actually don't have it on lvl 17.