Mercedes-Benz SL 2008 Owner's Manual page 65

Safety
Anti-theft systems
Remove the key from the ignition lock.
X
Press button 2.
X
Indicator lamp 1 flashes briefly.
Lock the vehicle using the key. On vehicles
X
with KEYLESS GO*, the locking button on
the door handle/boot lid can also be used.
The interior motion sensor remains deacti-
vated until the vehicle is unlocked and
locked again.
62
* optional