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I've got an automatic transmission in my 645. When I use DS or SPORT mode, the transmission does NOT shift into 6th gear - ever. As a result, even when crusing leisurely (as opposed to cruising aggressively ;) ), the RPM's stay fairly high.

Is this normal?
 

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Yes it is. Sport mode deactivates 6 gear. 6th gear is an "overdrive" to improve fuel economy.

The way around it is to stay out of sport mode and use the manual step mode to shift gears yourself.
 

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sjainon said:
Thanks for the enlightenment. I'm glad it's not a defect.
You are welcome.

Also note, that once you turn on the car, and press the sport mode button, sport mode will be deactivated if...

1. You turn off the car
2. Put car in reverse
3. Press the button again.

It will not stay on all the time in order to achieve posted fuel economy.
 
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