Utopia Texas

The manual for my 2017 SL450 says NOT to use distilled water in the windshield washer reservioir because the electrodes that signal low fluid level will not register properly with distilled water. On the other hand my well water contains so many carbonates I dare not use it as it will eventually clog any small ports in the wiper. I do have two tubes of MB Summerfit concentrate on order. Will the addition of the Summerfit to distilled water allow the sensors in the fluid reservioir to work properly? Thanks...

F456 V12

Why don't just buy a gallon of Aquafina, Deer Park, Arrowhead or whatever your local grocery store stocks, seems far easier and less complicated.

MB

SDRider

Why not buy a gallon of windshield washer fluid and use that? That's the only thing I ever use in my cars.

Shadow5501

No water softener at your hill country location? Soft tap water is fine. If you have hard water and wish to use the mb concentrate, purchase some RO or filtered drinking water to use. It's not distilled and contains some mineral content so meets the letter of the law, so to speak.

Utopia Texas

On one hand don't want to clog up the micro ports on the wiper housings or on the other hand constantly look at the low fluid light on the dashboard when the reservioir is full. Thanks for the tips!

HAILERS2

I own a 2013 SL550 and in my opinion........the wiper/washer system on that car is pathetic compared to the 2009 SL I owned, the CL I owned or the ML350 Bluetec I still own.

I emptied the washer tank trying to remove bugs from Missoula MT down to Ft Worth, Texas. Useless system compared to the past. I used what the dealership put in the tank. When I fill it myself I use RainX washer fluid. No problems with the sensor in the washer tank at all.

Just a rant and nothing more than that. I recommend carring a rag and some Windex on long trips and forget using the windshield washer altogether.