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2003 C320 coupe, 2000 ML320
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886 Posts
Discussion Starter #1
Wife comes home tells me the windshield washer is just dribbling fluid.. Pump motor is good, pull the line and I can't blow through it.. Put a garden hose on it.. and it's still just a dribble.. I try for about hour,. trying to flush the line.. Still I'm getting no where.. I don't want to pull the cowl.. so I just pull up the rubber seal, lift the cowl enough to pull the line up and see what looks to be a small filter right next to the first spay nozzle.. It's not a filter, but a check valve.. at any rate, it was clogged up.. It comes apart easy enough.. so you don't have to buy a new one.. and the best part, you don't have to pull the cowl off to get at it.. So if you've been putting off, fixing your washer.. no need to..
 

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Wife comes home tells me the windshield washer is just dribbling fluid.. Pump motor is good, pull the line and I can't blow through it.. Put a garden hose on it.. and it's still just a dribble.. I try for about hour,. trying to flush the line.. Still I'm getting no where.. I don't want to pull the cowl.. so I just pull up the rubber seal, lift the cowl enough to pull the line up and see what looks to be a small filter right next to the first spay nozzle.. It's not a filter, but a check valve.. at any rate, it was clogged up.. It comes apart easy enough.. so you don't have to buy a new one.. and the best part, you don't have to pull the cowl off to get at it.. So if you've been putting off, fixing your washer.. no need to..
Pics bobby, so we can see what you've done. :)
 

Registered
2003 C320 coupe, 2000 ML320
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886 Posts
Discussion Starter #3
Ya, Khomer.. It's not until I'm done that I think about posting anything.. I'll post a pic of the check valve's location tomorrow, when it's light outside.....

PS. I was just trying to give you a heads up... It's not the spay nozzles,.. it's the check valve that's clogged..
 

Registered
2003 ml500, 2004 ml350
Joined
1,532 Posts
Bobby front is very easy, rear a bit more of a pain. Some diagrams say it is driver side of firewall. On my 03 and 04 passanger side about where the rear seat belt height adjuster is behind the trim. Dont have pictures of that location but here is the front.

Also I have been using a rain x type cleaner. I have been wondering if the chemical that coats the windshield also clogs the valve? Because since using it I have had it happen to both ml鈥檚.

2633582


2633583
 

Registered
2003 C320 coupe, 2000 ML320
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886 Posts
Discussion Starter #5
Thanks Wallyo,.. now I don't have to take pics...
Could be the on the rain-x.. The inside of my valve had what appeared to be crystals..
 

Registered
2003 ml500, 2004 ml350
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1,532 Posts
On mine there were mineral like deposits that glued the cylinder valve shut. I was using Peak Rain-off.

Here is an exploded view of the valve so others have an idea. Also if one can鈥檛 get the valve apart or it cracks while trying one can use a valve for any make vehicle as long as the tubing fits snugly, there are universal valves as well.

2633608
 

Premium Member
1999 ML430
Joined
1,739 Posts
I'm always trying to improve my 1999 ML430 that I ordered new back in late 1998. I have tried dozens of windshield wiper fluids over the years and by far the one listed below is the best out there...in my opinion..

This is a concentrate that is produced in Germany and is so easy to use. You buy a few gallons of distilled water and add a small amount of this (follow directions) to the gallon (1 to 100 parts concentrate). Shake up, stir and serve over ice....SORRY..wrong forum !

Shake up and you've got a light green fluid that does an excellent job of removing haze, bug detritus and whatever else may be thrown your way.

1Z Einszett Kristallklar Premium Windshield Washer Fluid ...

I would suggest you buy one bottle first, see how you like it and, if so, order a few more....I usually have 2 or 3 for the fleet. This stuff is poisonous (read the label) so keep away from children and animals.

One caveat..when mixing add product to gallon of water, not the other way around. If you add water to product you will have TONS of suds and inability to fill the jug. When used ,you will see a few small bubbles on the wiper blades but you will have a krystal clear windshield and a pleasant smell from the solution.

If you want outstanding results, post up and spend a little extra for some silicone wiper blades. My favorites are the PIAA brand and they pair well with this solution. Very quiet and none of the chattering associated with other blades.
 

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2003 C320 coupe, 2000 ML320
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886 Posts
Discussion Starter #9 (Edited)
Sounds good Springer,..for a show car that's been babied.. My ML's main purpose in life is to lead horses in and out of a muddy field.. Not quite the same animal, that you and i have..
Right now, I've got a couple of 50lbs bales of hay in the back,..I guessing yours has never seen a bale...
 

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2003 ml500, 2004 ml350
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Not a bad ride for just hay. Oldy enough we grow hay or at least my wife does Very very long story. But the mls are not involved at all.
 

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2003 C320 coupe, 2000 ML320
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886 Posts
Discussion Starter #11
Now Wallyo,.. you must understand.. That;s for Timothy grass only.. At $25 a pop, it deserves a nice ride
 

Premium Member
1999 ML430
Joined
1,739 Posts
bobby735.....Actually I have hauled hay in her ! Four bales for putting over new grass seed .

The 99ML430 is no show car and has never been babied.....just well-maintained.That's the beauty of the W163. It is a workhorse and my daily driver. I just stay on top of maintenance and care.

With the back seats flattened out , I have had it FULL of 20 bags of mulch from Home Depot ! That's about 400 lbs and you definitely have to readjust the mirrors! Also have hauled sheet rock mud/paint and asphalt shingles ! She is always up to the challenge. Recently hauled sod...now that was a mess ! Pair of heavy duty oversized drop cloths are always at the ready.

Sounds like for your situation, the four wheel drive comes in pretty handy. Do you use the high or low range for your farm? Only time I use mine is on dirt roads to engage and exercise the transfer case.

Would love to see some pictures of your horses and spread !
 

Premium Member
1999 ML430
Joined
1,739 Posts
Back to the original post....I recently had the cowling off the 99ML and removed the check valve to see if it had any debris....clean as a whistle !

It is not a pleasant job...wiggling and tugging on twenty year old plastic pieces that are just waiting to crack ! and lots of little springy clips that can disappear never to be seen again!
 

Registered
2003 C320 coupe, 2000 ML320
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886 Posts
Discussion Starter #14
I haven't taken any pics in a long time so I'll put some old ones..
2633750
 

Registered
2003 C320 coupe, 2000 ML320
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886 Posts
Discussion Starter #15
I think I used this for a Christmas card one year,.. Yes, that is a TV in the back ground..
2633752
 

Premium Member
1999 ML430
Joined
1,739 Posts
Bobby, how does one go about leading horses out of the pasture with the ML ? Are you just kind of towing them very slowly ?
 

Registered
2003 ml500, 2004 ml350
Joined
1,532 Posts
Back to the original post....I recently had the cowling off the 99ML and removed the check valve to see if it had any debris....clean as a whistle !

It is not a pleasant job...wiggling and tugging on twenty year old plastic pieces that are just waiting to crack ! and lots of little springy clips that can disappear never to be seen again!
You can get it out by just undoing the driver side corner. But yes, you need to watch the clips. I thought the cowl had a lot of flex left, but that was 2003 and 04
 
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