Leaking Windshield Washer Reservoir - Mercedes Benz SLK Forum
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#1 Old 02-22-2012
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Unhappy Leaking Windshield Washer Reservoir

Hello everyone! I have a 2000 SLK230 (R170). I noticed the last time I filled my Windshield Washer Reservoir that there was a big puddle under my car the next morning, and after a couple days the Windshield fluid light came on even though I hadn't used any. I looked under the hood and under the car but can't even see the reservoir. Anyone know how to get at it?
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#2 Old 02-22-2012
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Welcome from New Hampshire, that's a known issue they all leak. The tank is behind the fender, not that hard to remove the fender just an odd place to put it.
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#3 Old 02-23-2012
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#4 Old 02-23-2012
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We just bought an 01 SLK 320 and I noticed the same thing. Not all of it leaked out but when I filled it to the top it leaked quite a bit on the floor. Not as much as I put in though. I wonder if these can be got to by removing the inner fender?
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#5 Old 02-23-2012
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Quote:
Originally Posted by kcflhrc View Post
I wonder if these can be got to by removing the inner fender?
I'm wondering the same thing. One would certainly hope it could be. Has anyone here tried it?

Cheers,

///Mike
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#6 Old 02-23-2012
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Same problem here. I've been looking for a reservoir online with no joy. I'll be watching this thread.
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#7 Old 02-23-2012
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Hi , The reservoir can be gotten to by raising the front of the car , install your jack stands , NEVER WORK UNDER A VEHICLE THAT IS NOT ON SECURE STANDS . Remove the wheel , inner wheel well liner , and you should see the reservoir , do not remember how it is connected . hope this helps .
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#8 Old 02-23-2012
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Are those little rubber bumpers that stick down under the car the place for the jack stands?
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#9 Old 02-23-2012
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Quote:
Originally Posted by kcflhrc View Post
Are those little rubber bumpers that stick down under the car the place for the jack stands?

No, they are for a floor jack.
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#10 Old 02-25-2012
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I have a 2004 SLK 230 and had the leaky reservoir. Without looking at it I decided it must be the pump grommet so ordered one at MB. I pulled the fender liner and saw signs of leakage around a rubber plug on the forward ledge of the reservoir. Drove over to my local MB agency and the parts guy found the plug for me. It must have been a loose part becausr he didn't charge me for it. I pulled the reservoir out and changed the pump grommet as well as the plug. It's a pain to get the reservoir back in because there are hoses on the inner side that lay in grooves cast in the reservoir body. One bolt holds it all in. There are rubber bumpers which locate the tank. I wiped them down with Armorall and they slid in easily. I don't have the headlight washers so maybe the plug is for that. It's really not a bad job.
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#11 Old 02-26-2012
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Great info, Veloman. Thanks for the details and the pics!

Cheers,

///Mike
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#12 Old 04-04-2012
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Hi there.

getting a little confused. Having the same problem with my 2000 slk230.
what is easier and faster....to lift the car up, take off the wheel etc

OR

taking off the fender (if so, how to remove the fender?)?

OR...did I get this all wrong

thanks a lot.
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#13 Old 04-04-2012
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#14 Old 04-05-2012
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TomTom,

Go threw the wheel well. Take off the front wheel and then remove the wheel well. There are about 7 screws holding it in place. One of the screws is under the car. I did it about a month ago and found that a nipple coming from a pump was cracked. I was able to get it out and I epoxied the crack. Put things back together and life is good again. Its not a bad job.
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#15 Old 04-05-2012
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I was just rereading this thread and noticed that I had failed to mention the fact that the filler for the reservoir is not sealed to the top of the tank. It's a corregated tube that just slides into the tank. If you try filling it to the top of the filler screen it will very shortly run all over your floor. I don't know why Mercedes did it this way but if you're new to the SLK be warned.
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#16 Old 04-05-2012
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OK OK OK OK....
Let's clear things up a little bit...

I think that everybody's windscreen wash fluid starts spilling to the ground after they have poured enough of it in the tank, right?

So, if everybody's car does that, maybe this is a feature, not a bug?
When you have filled the tank, instead of spilling in the engine department, the liquid starts spilling on the ground...

Is this the case ???
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#17 Old 04-05-2012
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thanks GWHKahuna and Veloman.
However...taking the wheel off etc. sounds like a big job to me.
well...but seems to be my only choice.
Also good to know about that "filler- feature"
maybe i pour in a little bit of winshield fluid and see if it already leaks or not, to make sure that the leaking is not caused by the filler-feature before i start taking wheel off etc.

thank you very much guys.
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#18 Old 04-05-2012
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Alright.
I tried to fill my windshield washer reservoir again.
This time i poured it in the filler slowly so that the fluid doesn't build up/come up to the top edge of the filler.....and waited 10 minutes.......

NO leaking at all. So that was a great hint from Veloman. Thanks a lot!!!

However, now i discovered a new problem with the washer system

After using the headlight washer ONCE all the fluid i put in was leaking out of the headlight washer on the driver side.
The nozzel and whatever else is there to open that little lid are gone. there is only the cylinder left. I also found a taper, pointy plastic piece connected to some wires. Here are my questions.

-Does anybody have that missing piece and wants to sell it to me for a few bucks including some installation directions?

-Does anybody know what that taper plastic part is for and where it belongs?

While working on my drainige problem I also found a little, white plastic "box" laying right beside the battery. looks like it attaches to a hose or something. Any ideas where that belongs to???

I hope my description and the pictures will help you guys to understand what I mean. As you can see I am not a pro when it comes to cars.

Thank you very much!!!!!

Oh yeah....why did it even drain all the fluid? as you guys know if you push the button for the headlight washers they just spray for a second. so why did it keep leaking anyway????
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File Type: jpg SAM_0218.jpg (66.2 KB, 26 views)
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#19 Old 04-06-2012
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The little white plastic box is the vent for the battery. It collects any small amount of acid that might be expelled from the battery. In my 2004 SLK there is no vent hose so this little box takes its place.
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#20 Old 04-06-2012
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ooooh...i see.
Sounds like a quick fix (if i can find the right spot where it belongs....)
Thank you Veloman.

Does anybody know why my headlight washer drained all the fluid just by using it once for a second? isnt it suppose to close after it sprayed?
I couldn't even determen where exactly it was leaking....
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