Tuhia he haere tonu mo tenei whitianga - I te tau 2006, kaore a Klien i angitu i te whakataurite ki tana hoa kapa mohio ake a David Coulthard, i te mea i eke te Brit ki te papa tuatahi o te roopu, a he pai ake te ahua o Klien i te waa katoa. I te marama o Akuhata 2006, i whakapumautia kaore a Klien e noho ki te tiima Red Bull mo te waa 2007 e haere ake nei, i te iti rawa ranei hei taraiwa whakataetae, na te hainatanga a Red Bull ki a Mark Webber. Whai muri i ngā tohu e 2 i Bahrain me Tiamana
, i reira ko te tahi mea e pā ana ki te wahi Klien e haere i muri i roto i tona racing mahi, whakaaro tūtohutia Amerika rite te kōwhiringa arorau mo te Austrian, engari whakakahore ia he nohoanga ChampCar i roto i te kapa Red Bull-tautoko mo te 2007, pai ki te whai i te Formula Kotahi puku ki tetahi atu kapa. I te mutunga, i kii te tiima kua paahitia a Klien mo nga whakataetae e toru whakamutunga o te waa hei painga mo te taraiwa whakamatautau a Robert Doornbos.