Windshield wiper, function - GF82.30-P-3004GZ

MODEL 164

Fig 1: Windshield Wiper Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function prerequisite

C. 15R On

Automatic control

The automatic wiper control (rain sensor operation) function is switched on by turning the combination switch to position "I" or to position "II" (model 164.8 only).

The wiper motor is actuated depending on

Degree of windshield wetting
Ambient light conditions
Vehicle speed
Outside temperature are actuated.

The rain/light sensor and the overhead control panel control unit evaluate the signals. The wiper motor is actuated via CAN class B by the front SAM control unit.

Possible wiper stages

Intermittent wiper with variable intervals.
Continuous wiping at the required wiping speed.

Emergency running

If the communication between the rain/light sensor and the overhead control panel control unit fails, intermittent operation is activated at fixed intervals (approx. 5 sec.).

If automatic speed reduction is active the interval is approx. 7.5 sec.

Automatic speed reduction not for vehicles with USA version, code 494.

Wiping at predetermined speed

Model 164.1

Continuous wiping is activated by turning the combination switch to position "II" or "III".

Model 164.8

Continuous wiping is activated by turning the combination switch to position "III" or "IV".

The requests from the combination switch are sent over the steering column module to the front SAM control unit.

The front SAM control unit actuates the wiper motor as per the requests.

For continuous wiping at a slow speed (stage 1, approx. 40 cycles/min.), turn the combination switch to position "II" (model 164.1) or to position "III" (model 164.8).
For continuous wiping at a fast speed (stage 2, approx. 60 cycles/min.), turn the combination switch to position "III" (model 164.1) or to position "IV" (model 164.8).
For touch wiping, briefly push combination switch to the catch point.

By briefly pressing the combination switch, a single wipe is performed, when pressing for longer the wiping continues in accordance with the duration that the switch is actuated. Touch wiping always takes place at the currently selected speed stage but at least at stage 1. Touch wiping has priority over intermittent wiping. Touch wiping takes place independently of the operation of the windshield washer fluid pump (M5/1).

Combination switch component description	GF82.30-P-5000GZ
Steering column module component description	GF54.21-P-6050GZ
Rain/light sensor, component description	GF54.21-P-6000GZ
Overhead control panel control unit, component description	GF82.20-P-5216GZ
Electronic ignition/starter switch control unit (EIS) component description	GF80.57-P-6000GZ
Front SAM control unit, component description	GF54.21-P-7010GZ
Outside air temperature sensor component description	GF83.57-P-4000GZ
Wiper motor component description	GF82.30-P-5010GZ