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#1
09-17-2004, 03:27 AM
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misbehaving wiper
Having some intermittent problems with my 124 wipers (no pun intended!)
On one car, the wiper sometimes switches itself on for no reason, or occasionally when the turn signal is used. It only stops when the control is turned to full on, then off again. On the other, when using the intermittent switch, sometimes the wiper sweeps continually as if it is in position 1. I realise this is most likely due to bad connections in the switch, so what I'd like to know is whether its possible to strip the switch arm down for cleaning, and if so, where would I start? Or is this a problem due to a faulty relay, in which case can it be cleaned or should it be replaced?
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1987 300e manual 250,000 km (sold) 
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#2
09-18-2004, 12:55 AM
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This is happening to my wife's C280. The wiper cycles sporadically but more frequently when the left turn signal is on. Hope we get some tech advice on this.
Tim
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#3
09-18-2004, 03:44 PM
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I would agree the problem seems to be in the stalk/multi switch. The hard part is usually getting to it although I have not worked on a Mercedes one. I was recently quoted a price from the dealer for a new one for my C230 and it was pretty reasonable I thought. Something like 79.00. Mine is electrically fine but just mechanically sticky. In my experience with worn switches, sensors, senders etc on cars, it is unlikely that you will be able to service the assembly. If it is worn it has suffered subtle wear in some small areas that will be hard or impossible for you to improve. Even if you were able to get it working better, it likely would not be a lasting repair. I would quote out a new one and see how hard it would be to install. However, it is hard to say for sure without seeing the wiring diagram. I would guess that if it is worn it will exhibit some looseness. The activation when you use the turn signal seems to be a big clue but might not be what it seems. Sorry if this isn't really much help.
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine) 1988 F150 144,000 miles (leaks all the colors of the rainbow) Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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#4
10-05-2004, 01:43 PM
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Hmm. I've seen it too
Quote:
Yep, I am having an interesting and similar problem. Turn on headlights - wipers engage activate horn - wipers engage This is intermittant, not constant. I am hoping it is a relay issue, and not the botched grounding issue that I've read a bit about here. Any thoughts?
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James 85 300SD 285k Charcoal Gray/Grey MB-Tex 79 300CD 142000mi "Rabenshwarz" Black / Black MB-Tex, Burlwood Int. TOTALLED - 10/24/02 -- 
Last edited by JPL; 10-05-2004 at 01:44 PM. Reason: spelling
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#5
10-05-2004, 02:57 PM
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Quote:
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2007 C 230 Sport. 
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#6
10-10-2004, 06:04 PM
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did this problem get solved? How?
my wipers just quit working. Bright and dim lights are OK. I believe it to be the combination switch, but might be relay or something else? If combination switch, did you have it replaced? How hard to DIY?
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Nello Tare 1982 300D (266,001 mi.) looking and running great Previously owned: 1976 450 SLC 1983 300D 1976 300D also 1982 Jaguar XJ6 (loved, but gone)
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#7
10-11-2004, 12:42 AM
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nope. problem still there and haven't fixed it yet. Mainly because it isn't bugging me enough yet and I've had other bits to fix first. Also because the stalk doesn't look like it comes apart for cleaning and the nature of the problem leads me to suspect its a bad contact deep in the innards. I know from experience that its hard to disassemble worn switches and make them work right again so looks like the only fix is to buy a new stalk.
now if I could only figure out a way to get the wiper to wipe clean right in front of my eyes instead of creating a juddering smear I could live with any amount of unpredicability from the wiper switch.  (i think I just jacked my own thread there, doh!)
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1987 300e manual 250,000 km (sold)
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#8
10-11-2004, 02:27 AM
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simmo300e
I am uncertain about the cause of your sporadic electrical portion of your wipers .... but regarding the skipping part .... Be sure your wiper rubber inserts are new and if the blades (the portion that the rubber insert are held by to the arm have not been replaced recently you might want to just go ahead and get a new one. Be sure that the blade is perpendicular to the glass so that coming or going the rubber will flip flop easily and evenly. Also check the metal arm that comes from the center pivot. Make sure it is not twisted (common on older cars). Often if all above are good, that using a good cleaner such as ammonia and a plastic scrubbee to clean accumulated gunk and wax off the windshield will get your glass and wipers back to proper operation again. Haasman
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'03 E320 Wagon-Sold '95 E320 Wagon-Went to Ex '93 190E 2.6-Wrecked '91 300E-Went to Ex '65 911 Coupe (#302580)
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#9
12-18-2004, 08:45 PM
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The erratic action on the wipers on my wife's 97 C280 was fixed by replacing the turn signal plate.
Tim
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