Question about 1998 Mercedes-Benz C-Class

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I have a 1998 C230 with the single wiper. The wiper is going too far down beyond the park position when wiping and is hitting the hood. Is there any way to fix this?

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  • davehd2009 May 17, 2010

    I ended up going to the MB dealership, who (correctly) diagnosed the problem as the unit being loose and had lost its timing. They retightened it (I am not exactly sure what had loosened) and retimed it and it now works perfectly! The only downside was the cost - approx. $230.

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  • Mercedes-Benz Master
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Sounds like the gear inside is becoming worn from use. Or maybe something has popped the plastic portion up and its hitting that way try to push down and snap it back on. If its the first then only fix is to replace the unit.

Posted on May 09, 2010

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Can the wiper linkage cause the wipers to park vertical. Wipers work fine on all settings. Tried repositioning the wiper arms but it didn't work


normally if the wiper arms park in the wrong place , it is the fitting of the wiper arms on the pivot that is wrong
try pulling the wipers back off the windscreen , run them through a cycle and then switch off normally
that will be the park position in the motor gear box
then remove each arm from the pivot and re- position it about 1" from the bottom of the screen
that will be the parked position for the wiper blades
having done that then again pull the arms back of the screen and cycle as if wiping the screen
switch of and see where the arms now park on the screen
if it is close to where you set them then that is the park position
next run the wipers a cycle and see if at full movement one arm puts the blade over the edge of the screen or hits the edge
switch off and re-position that arm closer to the bottom of the windscreen
it is time consuming but the only way to park wipers properly as there is no master spline to set in the correct position
If they park any where after this exercise ,replace the wiper unit as there is a problem in the contacts in the motor box.

Sep 14, 2015 | Cars & Trucks

1 Answer

Monowiper works fine when in full wipe but when in intermittent wipe and park mode it stops 3 inches too high ??


It sounds like the wiper parking position relay has failed. You see, when you turn on the wiper a series of relays on the actuator side are energized and cause the wiper motor to turn on and move the mono-wiper through its arc.

When it reaches the maximum extent of its travel, the wiper circuitry then reverses the arms direction and it swings back. This goes on until you turn off the wipers by turning off the ignition key or turning off the power switch.

When you turn off the wipers, the parking circuitry is activated. The central feature of this part of the wiper circuitry is the parking position relay. As the wiper begins to de-energize the parking position relay is activated. The position relay ensures that the wiper returns gently to the same position each time you turn off the wipers.

If the parking position relay weren't there, the wipers would park wherever they stopped on the windshield. However, the relay circuitry charges when you hit the off button and ensures that the wiper arm sweeps down to the same spot each time. If it does not activate, the wiper arm stops as soon as you turn off the power, as noted. This means that the wiper might, one time, stop in the center of the windshield or it might stop all the way to the left of right.

Aside from its complete failure, manufacturers build in telltales that indicate when the circuit is about to go. One of them is the wiper blade's parked position. Normally, the position relay ensures that the de-energized wiper circuit settles gently to the bottom of the windshield, as noted. However, if the position relay is failing most manufacturers have it park some distance from the bottom of the windshield to give you a head's up that the relay is on its way out.

Since the wiper circuits are fairly involved, it is best to leave it to a trained professional to do the work. However, if you feel you have the expertise to do it, your first step is to obtain the serviced manual for your vehicle. The service manual will give you the step-by-step repair procedure.

Since all parts of the wiper circuitry are related be careful, if you are repairing it yourself, that you replace each component according to the instructions as you might damage something else inadvertently.

Nov 12, 2014 | Cars & Trucks

2 Answers

Erratic windscreen wiper action


sounds like the wiper control itself is playing up

Feb 27, 2014 | 2001 Nissan Micra

1 Answer

Wipers would not park, customer forced down wiper arm and broke off arm. Now no electric to wipers.


Before 1995 Ford interval wiper systems mainly consisted of a switch, the motor and the interval governor (also called the wiper control module or 'WCM'). The basic wiper systems just parked the wipers at the end of their travel at the base of the windshield and involved just one park switch.

The more complex systems not only stopped the wipers at the base of the windshield, but would actually recess them below the windshield to park them. This involved using two park switches to turn the wiper motor in a reverse direction. These were installed on the Crown Victoria, Grand Marquis, Town Car, Taurus and Sable.

The wiper switch (named 'Multi-Function Switch' on most models) had a common return or ground circuit and two input or signal circuits to the WCM. Basically, the switch was two modified potentiometers that varied the resistance to ground for the two signal circuits. When the wiper switch was placed in the low or high position, the WCM looked at only one of the circuits- the 'mode input' -and controlled the wiper motor accordingly. If the wiper switch was placed in any of the interval positions, the mode input told the WCM that the switch was in an interval position. The WCM then looked at the second input - the 'delay input' - and used it to determine the amount of delay between wipes.

1) To run the wipers on low or high speed, the WCM provided constant power to the wiper motor on the proper circuit to provide the requested speed. Dual park switch motors
1.1 The first park switch operated basically in the same way as the single switch systems.
1.2 The second park switch worked in the opposite manner- when the wipers were off the park position, the second switch provided a ground for the wiper motor. Power and ground were now provided by the park switches.
1.3 When the wipers needed to park, the polarity of the switches changed, and thus provided reversed voltage to drive the motor in the opposite direction.

2) To run the interval wipers, the WCM applied voltage to the wiper motor only momentarily to get the wipers off the parked position.
3) The electro-mechanical park switch made a circuit between the power feed in and the output to the WCM. Power was provided from the park switch through the WCM and back to the wiper motor.
4) When the wipers reached the park position, the park switch made a circuit between the ground and the output to the WCM, and the motor stopped running. The wiper motor and the wiper switch have remained much the same as the single park switch motors of the past.

The main difference is that the switch has become an input to the GEM instead of the WCM.
1) When the wiper switch is placed in the low or high position, the Run-Park relay is grounded by the GEM to provide constant voltage to the High-Low relay, which then provides voltage to the proper circuit of the wiper motor.
2) High-Low relay is in the low speed position unless grounded by the GEM.
3) The park switch not only feeds the Run-Park relay but is now also an input to the GEM. This tells the GEM when the wipers are in the parked position so it can de-energize the Run-Park relay.
4) When any of the interval positions are selected, the Run-Park relay is momentarily grounded to get the wipers off the parked position
5) The park switch then provides voltage to the other set of contacts in the Run-Park relay.
6) When the GEM de-energizes the Run- Park relay, voltage is still provided from the park switch to the High-Low relay and the wipers complete the stroke.

Click over diagrams for zoom:

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Hope this helps.

Feb 08, 2011 | 1993 Mercury Grand Marquis

1 Answer

How to change wind screen wiper motor mercedes c200 98 model?


Take key out of ignition. Remove wiper arm,raise hood to fully upright position, remove cabin air inlet covers. remove wiper assembly, remove motor. Plug new motor in and make sure it is in park position before installing. Good Luck.

Sep 11, 2010 | 1998 Mercedes-Benz C-Class

1 Answer

Rear wiper does not work properly


sounds like the slip rings inside the wiper motor that make it return to the park position have a dead spot.you will probably have to replace the wiper motor because parts are hard to come by.

Aug 29, 2009 | 1998 Dodge Caravan

1 Answer

Windscreen wipers banging on hood


just turn of the wiper switch turn off the key 30 sec later, move the wiper arm to the park position, then remove the caps plastic caps at the start off the wiper arm ( if fitted) and then tigthen the nut there and that should fi it

May 18, 2009 | 1997 Hyundai Accent

2 Answers

Windshield wipers not parking


The problem could be a bent parking pall bracket. This is usually caused when you wipe snow from windshield using the wipers instead of brushing off. You need to remove both wipers and the cover from the drivers side. Remove the cover over the wiper motor assembly (held by a plastic button). On the right side of the wiper mechanism is a small tab (part of the wiper bracket). This tab needs to be straight for the wiper park pall to rest against.Carefully hammer this tab straight (or you may have to replace bracket, big job) Then cycle the wiper and you will see the assembly return to park position. Re-install all parts in reverse order.
Hope this works for you.

Jan 15, 2009 | 2003 Chevrolet Impala

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