Blocked windscreen nozzle

whitenemesis

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Your Mercedes
CLS55 AMG '05
Disconnect the supply pipe from underneath and blow through the nozzle with an airline. Using a pin from outside to clear can sometimes work but often makes the problem worse by compacting the obstruction.
If neither option works it may be hard water scale (especially if they are heated nozzles), in which case one would need to remove the assembly and soak in descaler. Use of poor quality screen wash can be the cause. Also never good to mix different types of concentrate as this can cause gunk to precipitate and sludge up the tank and nozzles.
 

Ductman

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Hampshire
Your Mercedes
C350 CDI Estate/R171 200 SLK/Lotus Exige V6/Lotus Evora GT410 Sport
I find a pin can often be too big, so use a different implement to get deep into the nozzle to clear it. If you have a steel wire brush, take a pair of pliers and selecting just one of the wire bristles, pull it out of the brush. This bristle should then be thin enough to get deep into the nozzle from the outside to clear any blockage.
I've used this method many times over the years with great success.
 

Naraic

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Your Mercedes
2005 CL500.
It might be blocked...but it might not be. If it's anything like the W210...the nozzle may be disconnected from the pipe feeding it.
 

Gary Hanson

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Your Mercedes
A Jag. Jags are my favourite.
A piece of 0.6 mig welding wire is a good substitute for a nozzle cleaner.
 

jasonyw

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Your Mercedes
c180/1997/1.8;W211/2005/E200K
Only Mercedes nozzle doesn't work. Never heard of in ford, Nissan and other cars.

I opened it up twice on my w211, I gave up as long as the other side of the nozzle works and doesn't fail mot. It something to do with the ball bearing inside.
 

Rotorhead500

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Very South Devon
Your Mercedes
Used to have a C63...
Got same problem on my GF's BM 116.... but that could well be down to lack of use & TLC!!! :rolleyes:
 

ianstaley

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Jan 8, 2008
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Your Mercedes
ML 270CDi 2001.
Yes but on those cars they throw a bucket of water at a time. But on the serious side Merc ones do seem to clog up quicker than other makes.
 

Miffy

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Bromley, London
Your Mercedes
CLK 320 CAB Elegance C208
I have had my car for 5 years, and not yet had a blocked jet. Maybe as I always use halfords premix (fairly decent stuff). My last set of fords did often block so it is not a MB issue.
 

Naraic

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Your Mercedes
2005 CL500.
^Me too...check the pipe connection.
 

SteveX

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I've had blocked nozzles before and used a pin from the sewing box to unblock it.

But I've also had a split pipe, especially in models with Xenons and headlamp wash, sometimes the T joins can perish. You should tell though if that were the case, as you would be getting dripping or a leak at the front of the car?
 

Naraic

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Your Mercedes
2005 CL500.
Wouldn't it be nice if the OP would at least acknowledge the replies he has had!!!
 

stevenN

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Feb 3, 2011
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Location
Nottingham, England
Your Mercedes
E220CDI W210 2002
I have.
Used a fine needle to wiggle in the hole and break up the blockage.
I also too the time to set the position of the stream onto the screen
 

westie

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Feb 22, 2006
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Your Mercedes
2009 ml 350 2001 200k w203
if one of the hole is blocked blowing air through it will not clear the blockage , the air goes round it.
So disconnect the water pipe from the nozzle put a short piece of pipe back on the nozzle, fill it with water and ten blow it throu with an airline or better still a compressor.
 

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