Keyless Ignition
The wireless key fob allows access to vehicle operation. See the Starting the Engine section for details.
Starting Key Fob Operation:
When the electrical system is activated by the engine start/stop button, the key fob must be within range. If the key fob is not detected, the security light will flash. The electrical system will automatically shut down.
The starter motor will not engage during this time. If a key fob is not available, a passcode can be entered using the Ride Command display (or the instrument cluster, if vehicle not equipped with Ride Command). See the Security System section for details.
Driving Key Fob Operation:
After pushing the engine start/stop button, the Wireless Control Module (WCM) will verify that the key fob is within range. The WCM will verify that the key fob is within range again once the speed of the vehicle rises above 3 mph (5 kph). If the fob is not found within 1 second, the chime activates for 6 seconds and the security light turns on. The chime does not repeat. If the fob is eventually found, the security light turns off.
Key Fob Storage:
The key fob should not be stored near devices that can cause interference, such as radio waves, cell phones, power supplies, or magnets, during operation.
Key Fob Storage Key:
The storage box can be unlocked with a key pulled from the back of the key fob. Model S comes with a glove box lock and key, but not with rear storage locks.
Push the button 1 on the back of the key fob to remove the access the key. |
![]() |
Key Fob Battery Life:
For AutoDrive Transmission vehicles: Pressing the start button and/or the brake pedal will reestablish connection between the Wireless Control Module (WCM) and the key fob.
For Manual Transmission vehicles: Pressing the start button and/or the clutch pedal will reestablish connection between the Wireless Control Module (WCM) and the key fob.
While the connection is inactive, functions that involve the key fob, such as arming the alarm system, will not be available until after vehicle startup.
Key fob battery life is approximately 2 years. Battery changes recommended yearly. Multi-Function (Two Button) Key Fob battery life will decrease with frequent use of the LOCK / UNLOCK buttons.
Low battery indicators:
-
Decreased fob authentication range
-
Horn honks 5 seconds after startup
-
Security light stays illuminated for up to 20 seconds
-
Both battery light and security light are illuminated
-
Ride Command notification
Key Fob performance can be affected by the following conditions:
-
Close proximity of ferrous materials (e.g. money clip or pocket knife)
-
Key Fob held in ferrous container (e.g. metal cup holder or glasses case)
-
Cold temperatures (Key Fob should be kept above 45 F (7 C))
To replace the Key Fob battery, do the following:
-
Remove the courtesy key by pushing the button on the back of the fob 1.
-
Pry the back door off of the Key Fob to access the battery.
-
Replace with new battery.
NOTICEKey Fob Replacement Battery Part Number: 4014675 or CR2032