All Mercedes Benzes have a two speed wiper motor with a intermittent feature on them, the wipers are controlled by a switch on the stearing column.

As the switch is rotated the wipers at a slow medium or fast setting, pressing down on the end of the switch operates the intermittant feature and the windshield washer system at the same time on the wiper motor the intermittent relay is mounted.

Mercedes benz wagons have a rear window wiper washer system, it is controlled by three push buttons at the left top corner of the console.

This system Has a low speed only with a intermittent with washer, Mercedes also comes with headlamp wiper system as well, and is also operated by the windshield wiper switch and the washer operation is activated by the pedal switch,pump action is activatedby a contact switch in the headlamp wiper motor Headlamp glass is sprayed during each wiper cycle.

WARNING: Observe the following precautions on models with Supplemental Restraint Systems(SRS) Disconnect the ten point SRS conector under the passenger foot rest and also the sheild battery ground, models with SRS may be identified by a SRS light below the tachometer.

Testing of the windsheild wiper motor can be done as follows,by conecting positive battery voltage to conector pin no three, and battery ground to pin number six to test low speed testing and positive to pin # two for testing the high speed, intermittent operation is controlled by touching positive to pin # five, if need you can get the Wiper Motor #124 820 07 08.

Testing of the headlight motor by conecting battery positive to the red wire on the motor and ground to the case, If needed the left motor #124 820 07 08 and the right Headlight Motor #124 820 62 42 can be replaced as well, for the 1986 mercedes Benz 300E.

Disassembly of Windshield wiper motor

Remove wiper arms from shafts,remove four rivets and left air grill,Remove two Screws and rivets on center cover, pull linkage from motor crank arm, remove water drain plug from right wiper shaft, disconect wiring and push plug through firewall panel, remove mounting bolts and pull out motor ! To install reverse removal procedure

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