Mercedes Benz Workshop Service and Repair Manuals

Seat Heater Control Module: Description and Operation

GF91.30-P-5209GZ Heated Seats/Seat Ventilation Control Unit, Component Description

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with CODE (401) Front deluxe seats, incl. seat heating and seat ventilation

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with CODE (872) Electrically heated left and right rear seats

Location

The HS [SIH], seat ventilation and steering wheel heater control unit is located in the 2nd seat row under the seat cushion on the passenger side.

Tasks

Voltage supply

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of the 2nd seat row heated cushions

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of the seat ventilation blower regulators

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of the steering wheel heater

Actuation

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of the 2nd seat row heated seats relay

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of the steering wheel heater relay

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of the seat ventilation blower regulators

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of the 2nd seat row heated cushions

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of the steering wheel heater