Over the last few days I've noticed the ASSIST and CHARGE function to be much more active, whereas before you could spend a lot of time in a non show CHARGE or ASSIST mode, it now tends to be showing one or the other all the time unless I'm cruising at steady speed. The gauge is also showing a lot more bars than before e.g. moderate acceleration is enough to bring on almost the full scale - likewise for deceleration with gentle braking. It appears the system has become much more sensitive all of a sudden. Mpg appears to be unaffected and it still drives OK. Total mileage is 52k and the IMA light isn't on. Any ideas?