Check Windshield Washer Fluid
Thread Starter
Super Member
Joined: Oct 2009
Posts: 887
Likes: 6
From: Northern New Jersey
2010 GLK Black, Premium 1, Lighting, Multimedia, Appearance and Media Pkg, 2012 Corvette Grand Sport
Check Windshield Washer Fluid
Normally when the indicator comes on I fill the reservoir. But after I filled it the light kept coming on. I called MB and they said that it sounded like the sensor. I brought it in and they gave me a loaner (it was a Camery) they have a whole fleet of them. When I came in to pick up my car they said it was not the sensor but the washer fluid I use Rainex washer fluid that I buy by the gallon. They said that the concentration did not bring the freeze point low enough. Never heard of a sensor that detects the temperature concentrate mixture.
Senior Member
Joined: Sep 2009
Posts: 361
Likes: 3
From: Chicagoland
2008 ML350 4matic
My SA in Illinois advised me specifically not to use Rainex products for that exact reason. He did not hard sell me on the factory stuff either....went with prestone...no problems.
