Mercedes-Benz SL-Class 2008 Owners Manual - Manual (Page 238)

237
Controls in detail
Driving systems
If only the red distance segments illumi-
nate and no acoustic warning sounds, the
Parktronic system sensors are dirty or
there is an interference from other radio or
ultrasonic signals. The Parktronic system
will automatically switch off after
20 seconds and the indicator lamp in the
Parktronic switch comes on.
̈ Switch off the ignition ( ୴ page 40).
̈ Clean the Parktronic system sensors
(
୴ page 337).
̈ Switch on the ignition ( ୴ page 40).
or
̈ Check the Parktronic system operation
at another location to rule out interfer-
ence from outside radio or ultrasonic
signals.