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Old 01-05-2009, 01:57 PM
bobs's Avatar
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Join Date: May 2007
Location: Richmond, VA
Posts: 310
OK, Where's the Stinkin' Check Valve...

Hello all. The washer system on my S420 has been acting up lately and I could use a bit of help. When I hit the washer button it takes 2-3 seconds before I get fluid from the windshield nozzles. I know there's a check valve in there somewhere but I can't seem to find it! If anyone knows where the washer check valve is on a W140 I'd really appreciate it if you could tell me. Thanks!

"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles
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Old 01-10-2009, 01:11 PM
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Join Date: Feb 2008
Location: Toronto, ON Canada
Posts: 3
Shouldn't be too hard to locate. Follow the hose from the reservoir.
On my W124 it is very close to the w/w/ nozzle (passenger side).

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