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.
66 20 517 Removing and installing/replacing a front center left ultrasonic sensor (S63)
Necessary preliminary tasks:
- Remove FRONT BUMPER PANEL .
Unfasten plug connection (1) and disconnect.
Unclip ultrasonic sensor (2) from retaining tabs.
Installation note:
Before installation of ultrasonic sensor (2) on wiring harness, clean plug connection!
Retaining tabs must not be damaged.
Make sure ultrasonic transducer (2) is securely seated.
Installation note:
Make sure rubber ring (1) is correctly seated on ultrasonic sensor (2).
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.