It is the wiper control module mounted on top of the wiper motor. Available at most auto parts stores for just under $30. The salespeople have limited knowledge of this part and will try to sell you everything from a wiper motor to the wiper switch on the steering wheel. The correct name and part number is Wiper Motor Pulse Board Module 81-158pb.
Check in this order: Fuse, Switch, Motor, Wiring. See the Sources and Related Links section below for wiper blade information.
For what type of motor?
no.
The "park switch" located on motor assembly is not opening the power circuit to motor when it reaches "park" location. Remove cover and inspect switch, which is opened by a cam on motor shaft.
The windshield washer motor is located on the passenger side firewall
You need to remove the wiper motor and linkage assembly. Then disconnect the motor from the linkage, and turn on the wipers, to see if the motor is running or not. Then when you have the linkage out, manaully move back and forth to see if its binding or not. Usually a bad motor. Unfortunately, MB seems to have many problems with the wiper blade motors.
Remove the windshield wiper arm from the windshield wiper motor. Remove the wiring harness. Remove the retaining nut. Reverse the process to install the new windshield wiper motor.
if it is like my older model chev truck there is a circut board in the wiper motor assembly, (under the hood), that needs to be replaced. You can get the part at any auto supply store.
The windshield washer motor is mounted nside the windshield washer resovoir, you will see the electrical plug going to it towards the bottom.
The motors, both for the front and the rear, are located at the very bottom of the windshield wiper fluid reservoir. To gain access to them, you have to remove the battery and the battery plate, along with several other bolts that you gain access to from under the car.
You have a bad ground wire to the motor. Locate and repair it or just add a ground wire from the motor housing to the mounting bolt.
One could purchase a windshield wiper motor at a retailer such as AdvanceAutoParts. Alternatively, one could also purchase a windshield wiper motor online on Amazon or AutoZone.