Guys try this it helped me and I felt the difference instantly..I copied the whole process from w210..
Climate controll off,doors closed,radio off.Turn key to on position(not start) just to the position that all the lights are lit up on the dash.Press your foot to the gas pedal to the floor.(the reason you don't want it running)Hold for 10-20 seconds,turn key off with foot still on the floor,now slowly lift off the pedal and sit for two minutes before removing the key and exiting the car.Then when tempted go for a ride:thumbsup:
This procedure will set the factory shift points and rpm in the TCM to crisp settings.The harder you drive the car the less noticeable the change,but most people with a v8 will really get a charge out of the instant tune up.,a v6 will feel like chirping the tires.