my 2001 s430 with 90k came out a code is p0700..the car was running and suddenly the car runs like netural not going anywhere and i have to shift it to netural then back to drive then it's normal again...it's happen to me couple times now. sometime it feel like the car don't really want to change into gear... the shop change the trans fluid for me today and when i see them drain it, it only drain out around 1 qt...this is normal?. they have change the filter, gasket and add 5qt( is this enough?).i'm start to think that maybe is low on transmission fluid that causing the problem or something else?..can anyone tell me when low on transmisson oil will make the car sfit unnormal? also sometime went to netural? what knid of problem will you have when the transmisson fluid is low? also i just relize the my driver side front suspison makes some kind of squeeze noise when the road is unsmooth but runs perfectly fine..what can it be? thanks for reading this..please help..i'm new to this..