Brake Fluid Level Sensor/Switch: Description and Operation

GF42.10-P-4005RI Brake Fluid Indicator Switch, Component Description
MODEL 230.4 as of model year 09 /YoM 08 model refinement package





S11 Brake fluid indicator switch

Location
The brake fluid indicator switch is located in the brake fluid reservoir above the master brake cylinder.

Task
If the fill level of the brake fluid reservoir is too low, the brake fluid indicator switch transmits a signal to the driver-side SAM control unit (N10/10).
The driver-side SAM control unit places the information on the interior CAN.
The instrument cluster (A1) receives the information and actuates the brake fluid warning lamp and parking brake (A1e7). In addition, the instrument cluster displays a warning message on the left multifunction display (A1p13).