battery replacement VOLKSWAGEN PASSAT 2008 Owners Manual

Replacement vehicle keys
The vehicle identification number is required to get a replacement key or an additional remote control vehicle key.
Up to 8 vehicle keys, each of which must be properly cut, coded, programmed, and synchronized, can be used with your vehicle.
Each new vehicle key contains a microchip and must be coded with the data from the vehicle's electronic immobilizer. A vehicle key will not work if it does not contain a microchip or contains a chip that is not coded, even if the key bit was cut correctly.
You can obtain additional or duplicate remote control vehicle keys from authorized Volkswagen dealers, authorized Volkswagen Service Facilities, and from certain independent repair facilities and locksmiths which are qualified to make remote control vehicle keys.
Each vehicle key must be programmed by an authorized Volkswagen dealer, an authorized Volkswagen Service Facility in order for it to work with your vehicle.
To find the nearest qualified independent repair facility, locksmith, or Volkswagen dealer which can cut and code replacement vehicle keys, call the VW Customer Care Hotline at 1-800-822-8987 or visit http://www.vw.com and search for “replacement keys.”
Canadian customers can contact an authorized Volkswagen dealer or Volkswagen Service Facility or call the Volkswagen Canada Customer CARE Center at (1-800-822-8987).
NOTICE
The remote control vehicle keys contain electrical components. Protect them from damage, moisture and rough handling.
Do not press the buttons on the remote control vehicle key unless you actually want to use the function in question. Since terrain and conditions vary, pressing a button on the remote control vehicle key when it is not necessary may unlock the vehicle or set off the panic alarm, even if you think you are out of range.
Remote control vehicle key functions can be temporarily disrupted by interference from transmitters near the vehicle that use the same frequency range (such as radio equipment or mobile phones).
Things between the remote control vehicle key and vehicle, bad weather, as well as a weak battery can reduce the operating range.
If the remote control vehicle key buttons, Vehicle key set or the power locking buttons, Unlocking and locking the vehicle from the inside are pushed repeatedly in quick succession, the power locking system is switched off for a brief period to help keep it from being overloaded. The vehicle is then unlocked for about 30 seconds. Unless a door or the luggage compartment lid is opened in this span of time, the vehicle is automatically locked afterwards.