PEUGEOT RCZ Handbook page 69

MANUAL LUMBAR ADJUSTMENT
Turn the knob manually to obtain the desired level of lumbar
support.
Heated seats control
With the engine running, the front seats can be heated separately.
Use the adjustment dial, placed on the side of each front seat, to
switch on and select the level of heating required:
0 : Off.
1 : Low.
2 : Medium.
3 : High.