The mother-in-law's 2005 Renault Clio (auto) shifts very late and stays in too low a gear. When decelerating the tranny downshifts early (it really likes the revs). The garages all want a heafty sum to even pop the hood. Might the issue be something simple such as low tranny fluid level? Anything else that I might check?
There is no 'sport' mode or 'snow' mode that I am aware of.