rodisi
Senior Member
I don't know if I missed something, somewhere, but should the voltage readings be taken when the car is at normal operating temperature? I took my readings in a cold car and have the impression that that may be wrong.
It's very possible that I am wrong. I'm only saying it because the car does not have the oomph of a turbo.I am sure you will find that all the LHD Mercedes W210 CDI cars have turbos as well - I am suggesting you are wrong,
I have rarely taken a car in to a garage for fixing, however I've never had a car as "technically advanced" as this.How keen are you at automotive DIY?
It seems from your questions that your are quite unfamiliar, but still keen to get involved.
I don't know if I missed something, somewhere, but should the voltage readings be taken when the car is at normal operating temperature? I took my readings in a cold car and have the impression that that may be wrong.
They have stuck in, you may be lucky with a pair of pliers and give them a twist, but only do it from the end sticking up, if they will come out then a light sand and they should be fine, never oil them.
That is my problem, I can't pull the plungers up and I can't lift the plate. When I try, the plungers stay in their place and won't lift off - that's what's so annoying. Even more annoying is the fact that I can push the plungers down against the springs and they pop up again but stop as if there's a snap ring preventing them from coming up any further.With the plate off the car you have got to .....
And why is the valve even being taken apart?
We need to see 0v on your 'pin3' with hot air in the car before we have reason to doubt the valve - it may well be fine.
If the control panel back lighting fails to light up with the headlights, but the lighting does flicker, this suggests a dry joint on the circuit board - a common fault with the W202.
I know you feel you have read it all on the internet, but please do have a look here, the pictures show how the conical valves are pressed onto the plunger shafts...
http://www.peachparts.com/shopforum/tech-help/242566-how-i-fixed-my-duovalve-w210-got-my-heat-back-saved-myself-$250.html
So I got fed up with this story and decided to go to a junk yard and see if i can find my duovalve. I did. I was lucky that it was in the car and it gave me the opportunity to see how to take the whole thing out.Thats a good video and a mystery to me now there are only the bronze valves in the bottom