W205 C300 Windshield Pump not working
Thread Starter
Junior Member
Joined: Jul 2019
Posts: 20
Likes: 1
2015 C300
W205 C300 Windshield Pump not working
Has anyone had any experience to replace the windshield pump? Is it expensive? I washed my car today and found that the windshield water not spraying out on my way back home. When I pressed the button I heard no pump running sound, so I guess the pump is not working. I am thinking to replace it, but not sure how many do I need because it seems like 3 nozzles there.
Any suggestion will be appreciated!!
Any suggestion will be appreciated!!
Senior Member
Joined: May 2019
Posts: 431
Likes: 86
C400
Super simple, pump is like 20 bucks. It's two hoses and a plug. You access it by unscrewing a plastic panel under the drivers headlight from under the car (no lift required, see link)
https://www.mercedesmedic.com/merced...luid-problems/
https://www.mercedesmedic.com/merced...luid-problems/
Member
Joined: Sep 2019
Posts: 119
Likes: 56
From: SD
2000 C230 - 2001 E430 - 2003 E320 -
Check the fuse first.
The pump is accessed by removing the left fender well. So remove the left front tire, remove the fender liner, and you will be looking at the pump.
Most likely the pump you need is part number: A 099 866 01 21. When replacing it, check the grommet below, it is part number: A 001 998 73 01.
A new replacement pump from MB ebay dealers trying to sell inventory is around $30 and it will be significantly more than that if you buy it from the MB parts counter.
It is steps 1-4 of the attached WIS.
The pump is accessed by removing the left fender well. So remove the left front tire, remove the fender liner, and you will be looking at the pump.
Most likely the pump you need is part number: A 099 866 01 21. When replacing it, check the grommet below, it is part number: A 001 998 73 01.
A new replacement pump from MB ebay dealers trying to sell inventory is around $30 and it will be significantly more than that if you buy it from the MB parts counter.
It is steps 1-4 of the attached WIS.
Last edited by tyabnet; Jun 22, 2020 at 12:55 PM.
Senior Member
Joined: Jul 2019
Posts: 286
Likes: 140
From: Bay Area, CA
2016 C300W4 (W205), Luxury Pkg, Diamond Silver Met. and Silk Beige\Espresso Interior
@Jim Hopper are you from Hawkins Indiana by any chance? 
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Thread Starter
Junior Member
Joined: Jul 2019
Posts: 20
Likes: 1
2015 C300
Check the fuse first.
The pump is accessed by removing the left fender well. So remove the left front tire, remove the fender liner, and you will be looking at the pump.
Most likely the pump you need is part number: A 099 866 01 21. When replacing it, check the grommet below, it is part number: A 001 998 73 01.
A new replacement pump from MB ebay dealers trying to sell inventory is around $30 and it will be significantly more than that if you buy it from the MB parts counter.
It is steps 1-4 of the attached WIS.
The pump is accessed by removing the left fender well. So remove the left front tire, remove the fender liner, and you will be looking at the pump.
Most likely the pump you need is part number: A 099 866 01 21. When replacing it, check the grommet below, it is part number: A 001 998 73 01.
A new replacement pump from MB ebay dealers trying to sell inventory is around $30 and it will be significantly more than that if you buy it from the MB parts counter.
It is steps 1-4 of the attached WIS.
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