Mercedes-Benz S 320 CDI, Owner'S Manual, Page: 514 / 588

492
Practical advice
Troubleshooting
You cannot lock or unlock the vehicle us-
ing the KEYLESS GO key.
There is interference from a powerful
source of radio waves.
왘
Lock or unlock the vehicle using the re-
mote control function on the KEYLESS
GO key. To do this, point the tip of the
key at the driver’s door handle at close
range as you would when using the sum-
mer opening or convenience closing fea-
ture (
컄
page 365) and try to open the
vehicle again.
왘
Unlock or lock the vehicle using the
emergency key element (
컄
page 495).
The battery check lamp in the KEYLESS
GO key does not light up when tested.
The KEYLESS GO key batteries are dis-
charged.
왘
Change the batteries (
컄
page 499).
The vehicle cannot be started using the
KEYLESS GO button. The KEYLESS GO key
is in the vehicle.
You did not depress the brake when start-
ing the engine.
왘
Depress the brake pedal and press the
KEYLESS GO button.
There is interference from a powerful
source of radio waves.
왘
Start the vehicle with the KEYLESS GO
key in the ignition lock.
You have lost the KEYLESS GO key*.
왘
Have the KEYLESS GO key cancelled at
a Mercedes-Benz Service Centre.
왘
Report the loss immediately to the vehi-
cle insurers.
왘
If necessary, have the manual locks
changed too.
Problem Possible cause/consequence Suggested solutions