Mercedes GLE 350 Windshield Washer Unclog W166 

This is a nice DIY video. I fixed my clog without having to resort to all of this. I drained the washer reservoir with a vacuum siphon as low as possible. I then added approximately 2 cups of bleach followed by about a gallon of hot tap water. Let it sit for about 10 minutes. I then took my garden hose and spray nozzle and stuck into the reservoir as far as it would go and stood back while the water was turned on full blast for a few minutes letting everything back flow out the top. Started the car and the washers were working again. I let them run a while to get the bleach out of them and finally rinsed everything with water. It is now good to go and took me all of 15 minutes.

No need to remove the wheel on a 2017 GLC300! From the steering wheel, just turn the tire to the far left. This exposes the plastic "clips" for removal. It's unnecessary and a "pain point" to actually jack up the wheel and remove it. The entire process is 5 minutes. Thank you!

Thank you for sharing. This is exactly what I need to fix my windshield washer does not work at full pressure. I didn't have to remove the wheel at all, just turn to the right as far as possible (I parked up on the driveway ramp so it might help in my case. I pried oven the wheel well trim enough to put my hands in, removed the pump and then removed the grommet for cleaning. I also found something interesting, if the hood is open the front washer won't operate (the rear does). I first thought that my stalk switch or the pump was broken! After cleaning the grommet which was full of white sticky gum, the washers now work at full pressure again.

2017 350 GLE washer pump replaced twice by the dealership, STILL wouldn’t pump just like your video. I had the same issue with plugged suction grommet. I also didn’t remove tire and just turned hard right (thank you commenters). Took less than 30 mins. Thank you for this awesome video and tip! So helpful!

Actually happened to me today, it was RAINEX that clogged my system . No need to remove tires or anything. I flushed out the water added bleach , waited 1 hour and went push the washer button and BAM back to normal !!!

It is not clogged by regular washer fluid. It is clogged by RainX PINK silicone based fluid as recommended by Mr. Scotty. Believe me, I have to replace my pump and nozzles after using this stuff. Now I am switching to regular blue stuff. No more issue.

Your video was exactly what I needed. Thank you for sharing this.

Thank you sir you have saved me quite a few bucks and a trip to my super expensive dealer in Haiti. Did it as you did and feels like i have never seen so much pressure from my nozzles. Thank you again for a very nice tutorial.

Awesome thanks. Basically same procedure for B180, but don't need to remove wheel, just park with full right lock

thanks Frank that information was priceless mine is doing the same I will give this ago and see what happens ,also was unaware about the hood being opened too , you just saved me a heap of cash to the stealership

Thanks for the video. I had the same issue but I did not have white gooey stuff but clogged grommet which was not visible. I thought the grommet had a big hole at the bottom but it was closed with few small holes. These small holes gets clogged with black debris. You have to remove the grommet to see the problem.

Thanks for the video. I had all the correct tools. I didn’t have to remove wheel as I raised the car on Air Suspension to Level 3. But even moving the wheel to the right would allow enough access. Top video, and hey, water jets worked again.

Thank you for this video. You showed the best video and gave detailed accurate instructions.

Thank you! Just had exactly the same problem, and same car. Will get it unclogged over the weekend and your video helps a lot.

Thanks for the video I'm sure you are going to save a lot of owners more then a few bucks.

Nicely done!! Gets right to the point! No fluff! Thank you!!

Thanks for the video mine was just trickling out. I now have a strong stream, almost too strong lol.

Thanks , this sorted my problem 👍

Amazing! Thank you so much for this video. Helps a lot!

Thanks for the info...got a gle400 with a similar problem...back pump runs,,but no spray on the glass...front pump doesn't run..no fuses blown

Thanks for the video. Will be doing this tonight! Do you know what kind of washer fluid we should be using in these vehicles? Thanks

Do you know how to remove the washer fluid reservoir? This is the closest video I have found regarding this sort of issue

Love your video I’m gonna try this tomorrow

Thank You. Perfect 👍👍👍

cheers for that, great vid.

Great 👍 thanks 🙏