Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
64 12 ... Initializing TELESTART Hand Transmitter (T90)
- Hand transmitter is replaced
- Car Access System control unit is replaced
The independent heating is switched on under an outside temperature of approx. 15 °C with the hand transmitter and at a preselected switch-on time.
Direct activation is possible at any outside temperature via the "Climate" menu item in the i-Drive, but not in driving mode.
To initialize a new hand transmitter, perform the following operations from inside the vehicle:
- Close all vehicle doors
- Within 5 seconds: Switch ignition lock from terminal "0" to terminal "R" and then back to terminal "0"
- Within 5 seconds: Press OFF button (1) on hand transmitter and with OFF button (1) held down press ON button (2) three times quickly
- Release both buttons. LED (3) on hand transmitter flashes
The initialization process must be repeated if there is no check back signal from the central locking system.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.