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.
Speech Input Control Module From 11.03.2008
The voice control system is part of the information electronics control module 1 -J794- (MMI) inside the instrument panel. It cannot be replaced alone.
If it is faulty, then the information electronics control module 1 -J794- must be replaced.
-- Turn off all electrical consumers.
-- Remove the key.
-- If control module is replaced, select "Replacement" function for appropriate control module in "Guided Fault Finding".
Use the Removal and Installation.
Removing
-- Remove the information electronics control module 1 -J794-. Refer to INFORMATION ELECTRONICS CONTROL MODULE 1 -J794- .
Installing
-- Install the information electronics control module 1 -J794-. Refer to INFORMATION ELECTRONICS CONTROL MODULE 1 -J794- .
Perform the following function test:
-- Switch on the radio.
-- Briefly depress PTT button on multifunction steering wheel.
A "Ping" tone sounds, the speech input system is active.
-- Say "Help".
Since the radio is active, the speech dialog system responds with "Commands for the radio are...".
Depending on the equipment, other functions can be selected:
-- If a telephone is installed, say "telephone".
The speech dialog system switches to the telephone mode.
-- Press and hold the PPT button for approximately 1 second.
The speech dialog system responds with "Cancel" and is deactivated.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.