W115 Windshield Washer - PeachParts Mercedes-Benz Forum

coldwar · #1 11-20-2004, 03:16 PM

Now that we're getting some dirty weather, I've had to put my windshield washers into service on my '76 300D- I've only had car since September, so hasn't been an issue until now. So- it has that almost silly foot pedal arrangement to activate the sprayers and automatic 3 to 5 sweeps of the wipers. Trouble is, the spray is very inconsistant. Sometimes it comes out of one side and not the other- then does a switcheroo. Other times it won't spray at all. Rarely does it give good spray on both sides. I've cleaned out both hood mounted nozzles with a hat pin, and really found they weren't clogged anyway. Also disconnected lines at various points, and when peddle is pushed, it pours out of the lines good and strong. I assume these work on vacuum, like most other accessories (must do, because they spray when engine is off and key is not even in the ignition switch).

Any ideas? I do have a couple of vacuum issues occasionally- mainly that when driving with doors LOCKED, the cruise control doesn't work well, and the engine won't shut off. When doors are unlocked, everything is fine- except the sprayers.

Dave

'76 White 300D W115 "Pearl"

Palangi · #2 11-20-2004, 09:30 PM

Every time I get a "new" old Mercedes, I have to replace the squirter jets to solve that problem. If you have a 115 where the foot pump still works, you are lucky. I understand the replacement part is no longer available. Mine had been converted to an electric pump before I got it.

coldwar · #3 11-21-2004, 10:00 AM

Foot Pump??? Well, that explains a lot! Would suggest that I have to keep stomping on it right? I thought it was just a press and hold thing, opening a vacuum valve that made it spray. Geez, it might have been better to run it off the spare tire- like old Beetles. Converting to an electric pump is an excellent sugestion. Does the switch for an electric pump conversion remain under the funkey foot peddle?

tower · #4 11-21-2004, 10:12 AM

I had a similar problem on a t-bird vintage 70's. Turned out that there was a matt of ***** inside the spray nozzles. Sticking a pin in only push it to the back of the nozzle reservoir (like 1cm^3) behind the jet. As soon as you tried them again, it jammed into the start of the nozzle choking any flow.

Maybe a good idea to replace them as Palanji suggests

Ron

Palangi · #5 11-21-2004, 09:10 PM

If the foot pump is still working, one push should squirt an adequate amount. On my old 240D, the PO had taken out the radio fader and installed a push switch in its place which activated a washer pump borrowed from some other car model. Not elegant, but it worked OK.