max0

The windshield wiper fluid comes out of all three wiper fluid nozzles really weak on my 2015 C300. I have attached a video showing how "weak" it is.

From under the hood, I removed the assembly including the plastic cowl (2058690007) and the nozzles to inspect and didn't find any leaks in connections. I also tried to use a pin to poke the nozzle openings.

Is it likely that I have some hoses leaking between the pump and the parts that I could check from under the hood?

IMG_4473.mov

Elvisfan0108

it’s age. It happens to the best of us.

matt.jessop

Your car is a beauty !

Elvisfan0108

Thanks, I got it in July. Exactly as ordered. I thought about ordering an E. If I did, I’d still be waiting for it.

max0

finally bought the part and took a look but in the end didn’t need to replace the pump. It’s the same problem as mentioned here https://mbworld.org/forums/c-class-w...ml#post7260156

the rubber plug/filter is clogged by the dirt that has gotten into the reservoir over time.

I didn’t need to remove the fender cover completely. Just peeled the cover back a little after removing the plastic rivets and nuts. A few inches of gap was enough to access the pump.

Nic Cuadra

Howdy, my car was doing pretty much the same and I found that the filter for the fluid was all clogged up with gunk. It is a pretty easy fix, the filter is behind the wheel well of the front left wheel. There is a video on youtube that shows exactly how to go about getting to it and cleaning it.

benzdude

I don't have any blockage but I do have annoying streaks and residue left when the washer fluid dries on my windshield.

Every summer I tell myself I will remove and clean my reservoir, nozzles and hoses. (big job)

I even bought a Siphon Hand Pump from Amazon, but then found out that inlet is blocking access to the reservoir. SAD.

I was going to try filling it with a strong vinegar / water mix, letting it sit and running it through the system to remove any residue.

You could try that on your blockage. Also it may just be the nozzles. Use a very small needle to clear them.

Looks like this was solved.

benzdude

max0

thanks. I searched YouTube left and right but couldn’t find these. Had I seen them earlier, I probably could have saved the $10 on the replacement pump that I didn’t need. (Don’t want to return it as I already opened the package)