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Finally!! fixed my washer fluid reservior leak...

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S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

Finally!! fixed my washer fluid reservior leak...

 
Old 06-30-2010, 02:34 PM
  #26  
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2001 S430
Ended up fixing it by buying new rubber grommets for about $10 for all three. When replacing them, slide them first onto the motor and then push it into the plastic reservior.
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Old 07-01-2010, 02:35 PM
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2000 S500 Almondine Black
Yeah I took the easy way and cheapest way without having to replace the entire hose. The hose wasn't expensive but it wasn't needed just the nipple being cracked...
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Old 07-27-2010, 05:07 PM
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2004 S55
Windsheild washer fluid leak

I have this same problem with my 2004 S55. Went to autobarn for the vacu tight hoses and the hoses were too small. So I cut the hose where the clamp goes onto the pump and put the hose straight on to the pump (very tight) bypassing the clamp....(type of clamp doesn't make sense to me). I still have a slight leak. I am going to change the grommets and see what happens.
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Old 04-28-2011, 01:01 AM
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S-430
God Bless AutoZone and part #47430!!!

Different day, same story. Dealer found the leak (I never knew) and asked $220 to replace the tank. I went as advised above to AutoZone, spent $3.99 and 3 min to fix it.

Thank you very much!!!
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Old 11-04-2011, 07:20 PM
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Originally Posted by my06clk View Post
YEah it was tricky as the leak started out very very subtle.. It was like it was evaporating in thin air... Finally it got to the point where I was filling the reservoir everytime I put in gas and i thought Hmm there is no waaay I am using this much fluid.. I use a lot because where I live the bugs come out looking for my car while I am driving at night... LOL

But I put a little positive air pressure to the reservoir and I saw right away where it was coming from...

Yor dealer is lame..LOL that sounds so stupid.. there is a pin hole in the reservoir cap to prevent vacuum lock. so that was dumb.. Also what good are the headlight washers if they suck all of the fluid right?? These guys crack me up sometimes...

I hope they finally fixed yours whatever they ended up doing..

Anyway... I'm sure someone else will have this problem sooner or later. so Don't go paying 90 bucks plus labor for the entire hose when its just a very simple mod to get rid of that problem forever....
Thai you kind sir as I seem to have the same issue with mine I noticed yesterday and will tryout your method. Also the top cap is completely cracked and might have to replace it with a new one. Need to find something without buying the entire reservoir. Will let you know.
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Old 01-02-2012, 10:47 PM
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2006 S430
Another Repair Option Found for Leaking Washer Pump Linkage

For those of you who are having a leak at the connection of the washer fluid pump to the output hose, I found another alternative to my06clk's Vacu-tite hose package 47430 at Autozone. I went to O'Reilly's and found that Vacu-tite makes another Vacuum Connector Assortment Kit - 47432. I used one of the connectors that has a small end and a larger end that makes a very tight fit to both the washer pump outlet and the output hose inlet - since they are slightly different sizes. See attached pictures...

Worked like a charm...
Attached Thumbnails Finally!! fixed my washer fluid reservior leak...-2012-01-02-13.22.36.jpg   Finally!! fixed my washer fluid reservior leak...-2012-01-02-12.44.38.jpg  
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Old 01-14-2012, 11:28 AM
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cl600
hey guys. i'm having a problem. i have a 2004 cl600 and have the leak at the connector from the windshield wiper pump to the hose. bought both suggested kits, auto zone # 47430 and vacu tite # 47432. my problem is i can't fit any of the connectors over the connector on the hose. can anyone give me some advice on how the fit the vacuum connector over the hose fitting. it appears that the hose fitting is between 1/4 and 3/8 inch. any advice would be greatly appreciated.
thanks
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Old 01-14-2012, 11:46 AM
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2003 S430 4Matic
It looks like a common thing. Mine has same leak, but very slow, 2003 S430.
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Old 01-14-2012, 12:27 PM
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houqoutwou, nice suggestions, that sure beats what they would rip you off for at the dealership so thanks for sharing your "fix".
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Old 01-17-2012, 03:22 AM
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2006 E500 & 2000 S430
Same leak on my wife's 2000 S430

Dealer wanted $472.00 to "replace the washer fluid reservoir and piping" (This was an exact quote); I said forget it. Spent a Saturday afternoon and good as new.

Thanks everyone!!!!!!!!!!!!!!!!
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Old 04-20-2012, 09:06 AM
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2003 Mercedes S55
thanks to your instructions i was able to fix the leak on my 2003 s55 amg ,i used very hot water to make the new rubber hose more pliable and i also fixed it in 10minutes
thanks again for sharing
danny
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Old 02-19-2013, 12:46 PM
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Originally Posted by my06clk View Post
Here ya go...

the part numbr for the Vacu-tite hose package is 47430 at Autozone...

Take the 1/8 X 2" from the package and trim 1/2" so that it will clear the light assy.

Force one end onto the plastic heater line connector, and insert the other end to the pump nipple for a good clean, leakproof seal.
my06clk,

Thank you soo much for this post. I was asked to replace my pump and whatnot... I replaced as shown in your pics and explanation. Now to see if there is another leak or I just fixed it !!!! Kuddos.. I love mbworld forums.. saved 1000's !!
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Old 05-14-2014, 12:45 PM
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Smile had same issue

Originally Posted by my06clk View Post
Here ya go...

the part numbr for the Vacu-tite hose package is 47430 at Autozone...

Take the 1/8 X 2" from the package and trim 1/2" so that it will clear the light assy.

Force one end onto the plastic heater line connector, and insert the other end to the pump nipple for a good clean, leakproof seal.
but instead of the vaccutite hose package i just forced a small hose over both the line connector and the nipple (had to hold pump in place as it wanted to move..(i put it on line connector first) fixed for about 5 cents and about 5 minutes of time..hell of a lot cheaper than MB wanted to replace entire heater line etc etc....thanks for this thread ....saved me several hundred with just this simple repair
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Old 10-05-2014, 12:05 PM
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Mercedes 300TE
washer fluid disappearing

Originally Posted by my06clk View Post
Dudes..

Finally I nailed down the source of my washer fluid leak.

On the reservior there are three connections, the center one is the pump and heating line for the window washer jets.

The the connection to the pum from the line was leaking because it is just a piece of plastic that is forced over another plastic tube fitting. Over time heat expands the little plastic fitting and causes a small leak.

I checked the dealer and this fitting comes with the entire heated line assembly for $90.00!!!!! "for a piece of 3ft rubber hose??? NOT Today" I said.
Plus this is another stupid design, so I didn't want to put the same thing back for the next guy... So.....

I went to autozone and bought a peice of rubber hose that was smaller than the connector, forced it over the plastic connector,cut it to about 2" and attached the other end to the pump nipple and PRESTO!!!

a quick modification that cost me $3.89.
check this video out if you have a washer fluid issue.
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Old 01-09-2015, 06:32 PM
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2007 S550 Designo Edition
Hi Guys,

Tried all methods mentioned here on MY06S350, but nothing seems to work. I even replaced the grommet with an OEM one!

The worst is that I drive all over during the day, sometimes even 150 miles, with a full reservoir at all times (I really check it every stop...). Upon arriving home, I recheck and verify the fluid is still at the top, and THEN COMES THE NIGHT..... I enter the garage in the morning, and the floor is wet, with blue borders (washer fluid), and the reservoir is empty to slightly above the pump's grommet level. Everything at the pump's base is moist, so I can't really determine the exact source of leak.

One thought I had is temperature contraction; why at night? Maybe because everything cools down, and that's when some crack, somewhere, opens and fluid leaks. I took the pump out and looked at it with surgeon's magnifying lenses, but nothing! Also, blocking the out nipple of the pump, then I blow into the pump but it's perfectly sealed !!!!

I'm so annoyed! It's not the $2.29 for the fluid I fill daily; it's the hustle I'm really tired of.

Any ideas?

Last edited by adf111; 01-10-2015 at 02:24 AM.
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Old 01-09-2015, 09:59 PM
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I need to do this
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Old 01-10-2015, 10:54 AM
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cl600
i had the same exact problem and tried everything you did multiple times. still leaked. i finally bought a new pump on amazon for like $8.00 and it fixed my problem. my old pump was working, but apparently some how was siphoning very slowly when not in use. as i said a new pump fixed the problem.
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Old 01-12-2015, 03:37 PM
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2007 S550 Designo Edition
biker349 Thank you!
Just Amazon'ed a pump $8.14 inc tax & shipping.

I also kinda suspect the pump, because is does have washer fluid dry marks above(!) some kind of a 8x2mm opening, on the opposite side of the nipple ...

Even if it's not the pump, the price is worth the try...
I'll report after replacement.
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Old 01-17-2015, 06:00 PM
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2007 S550 Designo Edition
Biker349 thank you, it WORKED!!!!!!!
Usually on the first night after filling fluid, it'll leak, loosing most fluid.
It has been 3 nights, and no leak at all!

Skylaw, maybe you should add this to the sticky.
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Old 02-10-2015, 01:28 PM
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S550 4matic, ML350
Seals on washer tank...

This thread helped me a lot to stop leaks on my w221 S550. What ended up solving the problem was replacing the rubber seals on the tank to the pumps (headlight and windshield) as well as the seal on the level sensor (was deteriorated when I pulled it out). All on the bottom part of tank. Next to impossible to fit these grommet - like seals with the tank in place. It was fiddly, but I removed the tank without taking out lights or trim. The pumps just lift out (pull back and up), but there is VERY LITTLE room. You have to remove the pumps and disconnect the wire plug to the sensor before the tank will come free. Remove the plastic engine cover and air intake and try to move as much "plumbing" out of the way. The tank will come out (only held in with bolt on top).... This is all W221, but the sentiment is to replace ALL the rubber seal/grommets if you're in there already....
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Old 02-15-2015, 03:36 PM
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S550 4matic, ML350
Pump leak

... and the leak came back. Turned out to be the pump itself. Remember to change the pumps while you are in there. Problem now solved and every possible leak point has been addressed!
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Old 05-22-2017, 08:13 PM
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2006 E320 CDI
Washer leak

Filled mine up and noticed fluid under right front tire, along the inside of the passenger's door and also puddle at the back... has anyone had this problem before..
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Old 08-09-2018, 09:14 PM
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2013 C350
I know this is an old thread but I thought I would add a quick solution to the leaky fitting by using an OEM part that I used on my R107. I found that it fixes the washer fluid leak on my W220 perfectly. It's a stepped vacuum connector MB part number 117-078-04-81 and goes for about $4 at several online sellers. See pictures attached. The larger step fits snugly over the larger elbow on the washer hose and the smaller step fits perfectly over the nipple on the washer pump. It's a bit of a U shape but it can be trimmed at any position to make it fit the way you like. Best Regards, Steve


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