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.
Comfort System Central Control Module, Data Bus On Board Diagnostic Interface, Control Module For Emergency Call Module And Communication Unit
A16
Telematics Emergency Battery
J393
Comfort System Central Control Module
J533
Data Bus on Board Diagnostic Interface
J949
Control Module for Emergency Call Module and Communication Unit
SM
Fuse Panel M
SM7
Fuse 7 on Fuse Panel M
T20b
20-Pin Connector, Black
T32i
32-Pin Connector, Naturally Cloudy, Black
T54b
54-Pin Connector, Gray
T54c
54-Pin Connector, Black
389
Ground Connection 24 (in Main Wiring Harness)
729
Ground Connection on Left Rear Wheel Housing
B273
Positive Connection (15) (in Main Wiring Harness)
*
Refer to Applicable Wiring Diagram for Fuse Positions
*2
Omitted as a Running Change
*3
Running Change
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.