Windscreen wiper.

bigasotonuk

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joe1972

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I'm not sure if it's already been mentioned, but I was having problems with the wiper on my e300d
Basically, the thing was erractic and wouldn't 'park' in the correct place all the time, and ran very slowly.
The fix was to pull and clean the contacts on the relay (the middle relay block under a screwed down cover behind fusebox on driverside on my car). I also used a very thin small dremel brush and a squirt of contact cleaner to clean out the dirty/corroded pin sockets the relay sits in.

The net result was it fixed the problem, but it also made the wiper run with the speed and power it should do.

It wasn't that difficult to do, once I found the correct relay, didn't take long, and maybe worth doing whilst you at it with the mechanism fix?

Well worth lubing the gear tho. mine was dry as a bone...so it runs faster and also doesnt queek anymore!

Just a thought.
hope this helps
 
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Dec

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All thoughts count, that would be the easier thing to try first and could very well be the solution in some cases, perhaps saving someone a lot of work if the were following the wrong advice.
There will sometimes be more than one solution offered for a particular fault, so the easier things like that should always be tried first.

Dec
 

Offspinner

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Offspinner

I have found this thread extremely useful. However I wonder if someone could throw light on this problem. My wife drives a V Reg C220 saloon. Driving home recently in heavy rain, the wipers stopped working. The RAC were called and after an application of WD40, they returned to life. Not wishing for the fault to return I searched the net and found this thread. Over the weekend I greased the mechanism, as described by Dec. Wipers working perfectly, but do not return to their park position, rather sit about 2 inches off. When wipers are started they go to the original park position, before starting their faultless trajectory over the screen. On stopping same thing, they park 2 inches off. They can be pushed into the park position, but will not return to it after operation. Any thoughts?
 

television

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You could undo the nut on the drive and park them,,then do up the nut again,,it could have moved when it was all too stiff
 

Offspinner

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Sorry if I sound stupid, but what nut?
 

Dec

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That’s the nuts, 1 or 2, in case Bashi needs to go that far.

Dec

attachment.php


attachment.php

Probbally nut 1 as in above picture, it will mean removal of the mechinasim in order to get acess.

Dec
 

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Dec

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Forgot to mention that there is a correct procedure to be followed in order to park a wiper blade correctly.

Before you start to remove the mechanism and motor (as in picture, motor cant be seen, but it is secured to the mechanism by the 3 gold colour bolts) you must first ensure that the WIPER MOTOR is parked, in other words it has been SWITCHED OFF AT THE STALK and allowed to finish its sweep and come to rest, the blade, in your case isn’t parking where it is supposed to, so it is this that you are going to correct by making adjustments at nut 1 and/or nut 2

Before you start, do as follows;
Turn on ignition…
Turn wiper ON at stalk for a couple of sweeps of a wet windscreen…
Turn wiper OFF at stalk, wait 2 seconds for the blade to come to a complete rest, i.e. park…
Remove key from ignition and keep in your pocket until you have finished…
Remove mechanism/motor as in above picture…
Make adjustments as described in above picture and tighten both nut/s as required…
Reinstall mechanism/motor…
Test.

Don’t separate the motor from the mechanism.

It should not be possible to manually move the blade/arm on the windscreen with motor off, but as you can, then this would indicate that one or both nuts are loos or have slipped, knocking out the park position of the blade.

Dec
 
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Offspinner

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Thanks so much. This has sorted my weekend project. When resolved I'll return with questions about a rattle the car has at low revs, which is coming from the back of the engine. Someone has suggested it is the clutch on the supercharger chain? Not causing too many problems yet, but very irritating. Also sounds very complicated. By the way the car is a V Reg C Class Sedan 230 Kompressor Elegance.
 

furto

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Wiper arm extender?

My problem with the windscreen wiper was the arm was not retracting properly and would smack into the side of the windshield where it would get jammed and scratch everything up.

I thought it was the parked position problem but everything is aligned perfectly.

I then realised the arm extention can move independant of the rest of the wiper assembly. I figured this would be a stripped cog so I opened up to find that the cog's teeth were fine. However, if I hold the wiper arm extention stuff so it cant move the cog will still spin (it sort of goes *click* *click* *click*).

It seems that when the wiper tries to retract, it grips the window and does not retract (because of this slipping cog) and as a result stays out and gets stuck.

Anyone know what the problem is or what parts I need to replace?

The second picture is the cog that seems to spin even if I hold everything (slipping inside)

 

furto

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I was wondering what the shaft is made of. Is it hardened steel or is it mild and easy to drill into. It looks like i need to put some small pins in.

Is it possible to just replace the cog/shaft and have it all working again?
 

Dec

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The cog is some kind of carbon fiber, it looks and feels like hardened steel, easy to drill but the shaft is a lot harder however if it were hardest steel then you wouldn’t be able to drill through it.
A roll pin is then cut to size and inserted into the hole, locking the coged wheel to the shaft.

It is possible but not practical to repair, it could be done but you would need a lathe and all the skill and knowledge to do the job and would cost more than a new mechanism.

I had the same problem that you have, my approach was to use the lollypop stick solution, after a few months I got a good mechanism from a scrap yard for £100 and fitted it.

Dec
 

stiffy.brian

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Wiper bodge.

I didn't catch it in time and stripped the gear causing the wiper to move in and out erratically. But being cheap did a work around. The sliding mech if left to slide erratically catches the wiper blade on the sides of the screen- bad. So I took off cover and put sleaves on slide bars so wiper couldn't move out and stayed in retracted position. It misses a bit of the screen now but not much and saved £0000's.
 

Captain_Pug

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It has worked and thankyou for such a fast reply and the detailed diagrams,
Many many thanks it works like new now, I thought I was having to buy a new wiper motor, phew.

Again many thanks.

A common fault but something to keep ontop off as stated can be a very expensive fix. always keep a can of WD40 in boot for emergency done me proud in moments like this.;)
 

taree

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c240 wiper motor problems

Hi all I've been reading the threads here and looks as though I have to get to the mechanasim but I can't fathom how to actually remove the wiper motor from my 1999 c240.
I've att'd a pic & you can see that there aren't any securing bolts as such -there only seems to be one 'centre' screw but I think this needs a special tool to open it.
Can anyone shed any light on this plse ?
 

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