mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Campaign - Air/Water Duct Reed Valve Inspection|Page 2093 > < Campaign - Air/Water Duct Reed Valve Inspection|Page 2091
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Rain Sensor: Description and Operation

Shown On Model 220

Position

The rain sensor is stuck to the inside of the front windshield.

Task

The rain sensor (B38) records the degree of wetting of the front windscreen and controls the wiper system interval time.

Design

The rain sensor (B38) consists of an IR transmit and receive unit and an electronic circuit that is used for evaluation and as an interface.

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