2008 Mercedes SL-Class Owner's Manual - Page 392
2008 Mercedes SL-Class Manual
Page 392 highlights
Practical hints What to do if ... Left display Right display Key Not Detected Possible cause/consequence The SmartKey with KEYLESS-GO* is not recognized while the engine is running because: The SmartKey with KEYLESS-GO* is not in the vehicle. There is strong radio-frequency interference. Possible solution Stop the vehicle in a safe location or as soon as it is safe to do so. Search for the SmartKey with KEYLESS-GO*. Otherwise the vehicle cannot be centrally locked nor can the engine be started again after the engine is stopped. Operate the vehicle with the SmartKey with KEYLESS-GO* in the starter switch. Change the position of the SmartKey with KEYLESS-GO* in the vehicle. Make sure the batteries in the SmartKey with KEYLESS-GO* are properly inserted ( page 407) and are not discharged ( page 113). Start the engine with the SmartKey with KEYLESS-GO* in the starter switch if necessary. F Key Not Detected The SmartKey with KEYLESS-GO* is not recognized when attempting to start the engine with the KEYLESS-GO start/stop button* on the gear selector lever because: The SmartKey with KEYLESS-GO* is not in the vehicle. The battery in the SmartKey with KEYLESS-GO* is not inserted properly or completely discharged. 391