Thank you all, but @ EddiePJ, the SUV is an oldie one (mk 2014) with 10 speed cassette (http://www.tweekscycles.com/bikes/electric-e-bikes/cube-suv-hybrid-29-e-bike-2014). I love (her) so much, nevertheless ;)
I surely don't want to completely mess my current shifting experience, but as RobF...