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.
GPS Reception
The GPS unit (option) has the task of receiving satellite signals for determining position. The antenna module (ATM) (16/110) transmits two different position signals on MOST:
- a received signal from the GPS satellites. Used by the multimedia module (MMM) (16/108) and the phone module (PHM) (16/60)
- a calculated signal. Used by the Phone Module (PHM) (16/60).
The calculated signal is obtained by dead reckoning. The antenna module (ATM) calculates the present position of the car based on the most recent GPS-signal. The control module receives information about direction and speed from the brake control module (BCM) and central electronic module (CEM) via the infotainment module (ICM) (16/1) to calculate the present position.
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.
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