E-Class Coupe (C238) & Cabrio (A238) 2017 - E200, E220, E300, E350, E400, E450 [Coupes &Cabriolets]

Washer fluid tank leak - where to access

Old Nov 24, 2025 | 03:03 PM
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2018 E400 4matic coupe / 2015 GLK 250 BT / 2008 F250 Diesel
Washer fluid tank leak - where to access

About 2 months ago I noticed washer fluid under the drivers side tire / wheel. I figured I spilled it or over filled it when topping it off. This weekend I noticed it again, wasn’t much but noticeable. Today walking up the the car, it has left a puddle.

I’ve been using rain-x bug wash, I know, shame on me…. So either the hose connections, pump or seal is leaking.

Do I access the tank from the top removing the plastic panels, from the bottom by removing the inner fender or both?

I assume it’s the same as the W213 sedan, but not much on the 238 platform.

thanks
OJ
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