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Mercedes-Benz C-Class: How to Adjust Windshield Washer Nozzles

Adjusting the windshield washer nozzles on a C-Class is not as simple as inserting the pointed end of a safety pin and adjusting. Mercedes created a special adjustment tool, since C-Class nozzles aren't standard pin holes.

By William Henderson - May 12, 2015

This article applies to the Mercedes-Benz C-Class (2007-2014).

Adjusting washer nozzles should be easy, and for most cars it is. You insert the pointed end of something like a safety pin into the nozzle pin hole, wiggle, and adjust until the spray hits the windshield where you want. But the C-Class isn't equipped with these types of nozzles. Instead of standard pin holes, W204 washer nozzles are more like slits that aren't easily manipulated. You can adjust washer nozzles with an adjustment tool designed specifically for these types of washer nozzles. Adjustment is easy once you get the right tool, and Mercedes even provides a diagram of just where the washer fluid should hit your windshield. A mechanic may adjust them for you for free or during routine maintenance, but there's no reason you can't complete this task yourself if everything else checks out.

Materials Needed

  • Washer nozzle adjustment tool Part #001 589 02 16 00
  • MB tool Part #110 589 02 63 00

Step 1 – Determine where washer fluid currently hits on windshield

Test where the washer fluid currently hits your windshield. Note where this is, because you’ll want to compare where the washer fluid hits after you’ve adjusted the washer nozzles to where the fluid hits before you adjust the nozzles.

Step 2 – Adjust nozzles

Insert end of adjustment tool into washer nozzle. Pry up to adjust the nozzle up (so that washer fluid hits higher on your windshield). Push down to adjust nozzle down (so that washer fluid hits lower on your windshield). Be careful not to use too much force because you run the risk of damaging the nozzle itself. Adjust the second nozzle in the same way.

Figure 1. Special tool for adjusting washer fluid nozzles of C-Class.

Step 3 – Double-check adjustment

Use the extension function of the adjustment tool to check that the fluid will land on your windshield where you intend it to land. This adjustment tool is fairly accurate, but driving conditions (e.g., how fast you’re going when you use your washer fluid) can affect where washer fluid lands. Alternatively, you can purchase a special tool for this purpose, Part #110 589 02 63 00, or Hazet 4850-1.

Figure 2. Measuring where washer fluid will hit windshield.

Step 4 – Test where washer fluid hits on windshield

Put the key in the ignition and begin testing where the washer fluid hits your windshield. Refer to the following diagram for an idea of where the fluid should hit. If washer fluid does not hit your windshield where you want, then repeat Steps 2 and/or 3 until the fluid lands where you want it to land.

Figure 3. According to Mercedes, this is where washer fluid should hit under perfect driving conditions.

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