I recently purchased a 98 v70 t5 and i have a few transmission questions. If i want to switch from sport to economy mode or vice versa when is the best time to do this? Should i have the car in park or at least stopped? Also the lights on the sport economy and winter modes seem to have red and green colors and I am wondering what these mean. Finally I am going to preform a transmission flush and was wondering how many miles I can drive until i have to preform the next one. I read somewhere that volvo recommends every 52000 but that seems a bit to long to me. Thanks