Mercedes-Benz 2006 SLK 280 Operator's Manual page 167

Controls in detail
Automatic transmission*
i
You cannot shift with the steering
wheel gearshift buttons when the gear
selector lever is in position P, N or R.
The last selected program
mode (C or S) is switched on when the
engine is restarted.
166
Downshifting
Warning!
On slippery road surfaces, never downshift
in order to obtain braking action. This could
result in drive wheel slip and reduced
vehicle control. Your vehicle's ABS will not
prevent this type of loss of control.
Briefly press the inside 1 of one of the
buttons on the steering wheel.
The transmission will shift to the next
lower gear as permitted by the shift
program. This action simultaneously limits
the gear range of the transmission
( page 160).
Upshifting
Briefly press the outside 2 of one of
G
the buttons on the steering wheel.
The transmission will shift to the next
higher gear as permitted by the shift
program. This action simultaneously
extends the gear range of the transmis-
sion.