Magic Wipers
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
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From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
Magic Wipers
I have an issue where the drivers side wiper does not start flowing for about 5 seconds (Quite a long time to let them go back and forth on a dry windshield).
I had a problem where they were not spraying, and I went to change the pump but just changed the pump filter (because I was sent the wrong pump, but the old one seemed good after changing the filter and cleaning the tank.
I don't think it is a pump issue because the right wiper starts spraying by the second sweep.
Are there check valves or a diverter of some kind that might need to be cleaned or replaced.
YES, I changed the wiper blades!
I had a problem where they were not spraying, and I went to change the pump but just changed the pump filter (because I was sent the wrong pump, but the old one seemed good after changing the filter and cleaning the tank.
I don't think it is a pump issue because the right wiper starts spraying by the second sweep.
Are there check valves or a diverter of some kind that might need to be cleaned or replaced.
YES, I changed the wiper blades!
Super Member
Joined: Jun 2025
Posts: 784
Likes: 249
From: USA
Common problem. Yes, there are check valves in the hose lines at each nozzle. The one for your driver's side is clogged or stuck. Find the small plastic valve in the hose leading to that side. Try cleaning it out with a pin and some vinegar, or just replace it. They're cheap and easy to swap.
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
Common problem. Yes, there are check valves in the hose lines at each nozzle. The one for your driver's side is clogged or stuck. Find the small plastic valve in the hose leading to that side. Try cleaning it out with a pin and some vinegar, or just replace it. They're cheap and easy to swap.
Did not see one on the parts drawing either.
Does anyone have a part number, or are we cutting out ones built into the lines and inserting the older type?
Super Member
Joined: Jun 2003
Posts: 713
Likes: 147
From: Aridzona
'15 S550, '10 E350 P1/P2, '02 ML320
Here's the Xentry Parts diagram showing the two pumps, #20 is the Centrifugal Pump at Liquid Tank (A2318660121), #30 is Centrifugal Pump at Winshield Washer (A2318660021). Both use the #40 Formed Grommet with the screen in it (A0019987301).
If you look for a photo of part #250 Hose Line to Reservior (A2228607300) you'll see it has two lines that go to the washer fluid tank, one for each pump.
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
I believe you are reading the diagram wrong.
I think there are two different (alternative) pumps.
One with a single outlet, and one with two outlets.
My cart as the single outlet, but FCPEuro sent me the wrong one.
I wonder if the check valves are non replicable due to the electrical (heaters) in the lines?
I think there are two different (alternative) pumps.
One with a single outlet, and one with two outlets.
My cart as the single outlet, but FCPEuro sent me the wrong one.
I wonder if the check valves are non replicable due to the electrical (heaters) in the lines?
Super Member
Joined: Jun 2003
Posts: 713
Likes: 147
From: Aridzona
'15 S550, '10 E350 P1/P2, '02 ML320
I believe you are reading the diagram wrong.
I think there are two different (alternative) pumps.
One with a single outlet, and one with two outlets.
My cart as the single outlet, but FCPEuro sent me the wrong one.
I wonder if the check valves are non replicable due to the electrical (heaters) in the lines?
I think there are two different (alternative) pumps.
One with a single outlet, and one with two outlets.
My cart as the single outlet, but FCPEuro sent me the wrong one.
I wonder if the check valves are non replicable due to the electrical (heaters) in the lines?
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Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
I also don't have night vision.
Are you updating the hoses to try to fix a problem? (One wiper spraying late?)
Are you updating the hoses to try to fix a problem? (One wiper spraying late?)
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Super Member
Joined: Jun 2003
Posts: 713
Likes: 147
From: Aridzona
'15 S550, '10 E350 P1/P2, '02 ML320
The driver's side does have a weak delivery, which is likely mostly due to the screen in the grommet, but if it's not that I want to fix it once.
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
Yeah I don't have a lot a time to do things twice, so when I go after it, if it's cheap I'll just do all the bits. Also, here in the desert the heat kills rubber and plastic and my car is 10 years old so it's just a little insurance.
The driver's side does have a weak delivery, which is likely mostly due to the screen in the grommet, but if it's not that I want to fix it once.
The driver's side does have a weak delivery, which is likely mostly due to the screen in the grommet, but if it's not that I want to fix it once.
I never seven considered the hoses on a 4 year old car.
Member
Joined: Nov 2024
Posts: 219
Likes: 97
From: The Racing Capitol of the World
2019 AMG S 65 and too many other vehicles to list here in this small box
I believe you are reading the diagram wrong.
I think there are two different (alternative) pumps.
One with a single outlet, and one with two outlets.
My cart as the single outlet, but FCPEuro sent me the wrong one.
I wonder if the check valves are non replicable due to the electrical (heaters) in the lines?
I think there are two different (alternative) pumps.
One with a single outlet, and one with two outlets.
My cart as the single outlet, but FCPEuro sent me the wrong one.
I wonder if the check valves are non replicable due to the electrical (heaters) in the lines?
The pump with the dual outlets is for the Magic Vision windshield system.
The pump with the single outlet is for the Night Vision camera lens.
So if your car has Magic Vision and Night Vision, you will have BOTH of the pumps installed at the bottom of the heated washer fluid reservoir.
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
You are correct in that there are two different pumps.
The pump with the dual outlets is for the Magic Vision windshield system.
The pump with the single outlet is for the Night Vision camera lens.
So if your car has Magic Vision and Night Vision, you will have BOTH of the pumps installed at the bottom of the heated washer fluid reservoir.
The pump with the dual outlets is for the Magic Vision windshield system.
The pump with the single outlet is for the Night Vision camera lens.
So if your car has Magic Vision and Night Vision, you will have BOTH of the pumps installed at the bottom of the heated washer fluid reservoir.
Member
Joined: Nov 2024
Posts: 219
Likes: 97
From: The Racing Capitol of the World
2019 AMG S 65 and too many other vehicles to list here in this small box
Look close at the diagram above and you can see there are two hoses bound together (part #250) running up from the pump to the valve assembly.
Here is a partial page from WIS that shows the two separate fluid lines coming from the washer pump. I added the blue/red dashed lines to show the two circuits.
Last edited by SemperFi; Jan 11, 2026 at 10:12 AM.
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
That's strange due to the Magic Vision requires two fluid circuits to operate as designed. Each wiper has dual hoses to spray only in the direction of travel.
Look close at the diagram above and you can see there are two hoses bound together (part #250) running up from the pump to the valve assembly.
Look close at the diagram above and you can see there are two hoses bound together (part #250) running up from the pump to the valve assembly.
It was a couple of years ago when I took it apart.
I recall that FCPEuro sent me the 2 poet pump, and I had to reuse the single outlet pump.
I don't think it was the other way around.
My wipers certainly seem to spray in only one direction.
I have replaced the blades twice.
Guess I will get a chance to take a closer look in a couple of weeks, because i need to take the front end apart to fix the lower front trim.
Member
Joined: Nov 2024
Posts: 219
Likes: 97
From: The Racing Capitol of the World
2019 AMG S 65 and too many other vehicles to list here in this small box
I will double check.
It was a couple of years ago when I took it apart.
I recall that FCPEuro sent me the 2 poet pump, and I had to reuse the single outlet pump.
I don't think it was the other way around.
My wipers certainly seem to spray in only one direction.
I have replaced the blades twice.
Guess I will get a chance to take a closer look in a couple of weeks, because i need to take the front end apart to fix the lower front trim.
It was a couple of years ago when I took it apart.
I recall that FCPEuro sent me the 2 poet pump, and I had to reuse the single outlet pump.
I don't think it was the other way around.
My wipers certainly seem to spray in only one direction.
I have replaced the blades twice.
Guess I will get a chance to take a closer look in a couple of weeks, because i need to take the front end apart to fix the lower front trim.
If you have Magic Vision, then there will be two hoses. If you have two hoses, you have a single pump with two outlet ports to connect the hoses.
Can't have two hoses with a single outlet pump. Let us know what you find out.
Thread Starter
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
No need to wait for disassembly, just look at the hose(s) coming up from the pump next to the fender.
If you have Magic Vision, then there will be two hoses. If you have two hoses, you have a single pump with two outlet ports to connect the hoses.
Can't have two hoses with a single outlet pump. Let us know what you find out.
If you have Magic Vision, then there will be two hoses. If you have two hoses, you have a single pump with two outlet ports to connect the hoses.
Can't have two hoses with a single outlet pump. Let us know what you find out.
I just looked looked part number for the pump FCPEuro sent me (and I returned).
the pictures from several sites show a single output.
So that means my pump has two.
Either way, I still have the problem where the left wiper does not spray till the 5th or 6th wipe.
