Flush your auto transmission and refill with new oil, that will solve your problems. But it will cost your somewhere around $600. That was last time when my dad's e39 did at Khangs Auto Transmission. PML say it will ruin the auto transmission???
Auto transmission oil, it is wise to change the oil every 2yrs. Draining and refilling is cheaper, flushing is very expensive but it's good to do since ur car is 4yrs old already. Good luck kmng2308.
Whatever problems with auto transmission problems, if the auto transmission oil and filter had not been changed before or u have no idea when it was changed. Try and change them 1st and see if there's improvement. If no improvement then ur nightmare begins hehehe.......