Sometimes Econ helps, but if you need more power better not use it and on hot day when you need fast cool you car with air conditioner.
In city i using econ with B mode
Econ mode affecting gas pedal response (you need to press pedal further to get more power) but mostly affecting settings of climate control, when you using econ rpm of climate control fan lowered and depending on outside temp air recirculation will be used and also this allows to climate control to have temperature gap if you requested 20 degree once this temp reached climate will lett your salon to heat up to 23 or more before it will start cooling again.
When used with B mode if you in city and gentle on gas pedal so you can catch the pedal position where vehicle almost not regen and not accelerating (you can actually regulate regen power by foot on gas pedal) , can get 2.6l/100km (but mostly i get 3.0-3.3 on flat roads and driving distance not less then 7-10km )
