Volvo 2008 S40 Owner's Manual page 130

6-speed manual transmission (option on certain models)
Depress the clutch pedal completely when changing gears
Remove your foot from the clutch pedal while driving. The shift pattern should be followed.
Overdrive (5th and 6th gears) should be used as often as possible to help improve fuel economy.
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Clutch interlock
The clutch must be fully depressed before you can start your car. If the clutch is not depressed, it will not be possible to start the engine.
Engaging reverse gear, 6-speed transmission
Reverse gear should only be engaged from a complete stop.
NOTE
Reverse gear is electronically blocked and cannot be selected if the vehicle is moving at a speed of approximately 13
mph (20km/h).
CAUTION
Never shift into reverse while moving forward.
WARNING
An extra mat on the driver's floor can cause the accelerator, brake, and/or clutch pedal to catch. Check that the
movement of these pedals is not impeded. Not more than one protective floor covering may be used at one time.
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