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.
Multimedia Module (Mmm)
The multimedia module (MMM) is an optional control module. Its primary task is to manage the functions for:
- navigation
- Traffic message channel (TMC)
- FM multiplex (Japan only)
- display screen
- DVD player.
Only the display screen is directly connected to the multimedia module (MMM). The DVD player is integrated in the multimedia module (MMM). The functions from other control modules are via the MOST network, but are managed using the multimedia module (MMM). The system is not compatible with music CD or DVDs.
The multimedia module (MMM) uses the MOST network to communicate with other control modules.
The control module checks activations and input and output signals via an integrated diagnostic system. A diagnostic trouble code (DTC) is stored if the control module detects a fault. Any diagnostic trouble codes (DTCs) are stored in the control module memory. This information can be read off using VIDA via the data link connector (DLC) in the car.
In order to work correctly on the MOST network, the infotainment control module (ICM) checks that the serial number in the multimedia module (MMM) is correct. The multimedia module (MMM) will not function if the number is incorrect. Try switching the ignition off and on if there are problems when replacing the control module.
A simple way to ensure that the multimedia module (MMM) is powered is to insert and then remove a DVD. If this does not work, check that the unit is powered and grounded.
The multimedia module (MMM) is under the left front seat.
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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.