Hello everyone, greetings from netherlands;

I have a w203 c2.2 cdi (model year 2000).
As soon as the ignition of the car was turned on, the windshield wipers worked, the wiper arm was in the zero position. this continued for 3-4 minutes and the wipers stopped working. If anyone knows anything about this, please help.
There is no rain sensor in the vehicle!

signal lever ( combination switch ) changed, problem persisted.
changed relay, still the problem persisted
wiper motor replaced, problem persists.
front sam module replaced, problem persists
In normal times, the wipers work very well. There is no problem with the water spray.
What could be the problem?

Note: star diagnostic done but windshield wipers fault not found in diagnosis. unfortunately i couldn't find the problem

This error still persists!
it's cold and the wipers now run for 10-15 minutes then stop and everything works as normal

wipers video

 

Assuming all the parts you replaced are of decent quality and working properly, I would next look at the wiper motor relay. I'm guessing it's sticking in the closed position.

If there is another relay of the same model in the SAM (notice the different colours) then you can also simply swap the relays and see if problem moves to the other circuit.

 

Thank you for your reply, I changed the sam module and all fuses, relaiss, and the wiper motor was also changed. It only makes this error when the vehicle is cold. it doesn't do it when the car gets hot, everything works normally. 4-5 hours after parking the vehicle, the same problem occurs again. When the vehicle key is turned to the 1st position, the wipers work and work quickly. It doesn't matter if I start the car, the wipers work by themselves. If the relais is faulty, shouldn't he have to do it all the time?


sam module


wiper relais

 

Thank you for your reply, I changed the sam module and all fuses, relaiss, and the wiper motor was also changed. It only makes this error when the vehicle is cold. it doesn't do it when the car gets hot, everything works normally. 4-5 hours after parking the vehicle, the same problem occurs again. When the vehicle key is turned to the 1st position, the wipers work and work quickly. It doesn't matter if I start the car, the wipers work by themselves. If the relais is faulty, shouldn't he have to do it all the time?
see sam Module photo

 

The relay may only be sticking when cold. But if you've replaced the relays with new ones, then that would eliminate the issue as well.

Did you use an OEM (Valeo) combination switch?

Something is closing when it shouldn't be. I would next check the wiring (start from the motor and trace upstream) and see if something is frayed. Any history of rats living where you park your car?

 

I don't understand what you mean here but the wiper motor brand is valeo ( and combination switch valeo )

 

Talking about the turn signal stalk/switch assembly. The OE MB switch is Valeo brand.

 

Simply connect star diagnosis and look at your actual values!

 

star-diagnoze done but could not detect the fault mercedes service. and that they could find the fault by checking the cable-fuse and so on one by one for fault detection, and that this could happen in at least 4-5 hours. hourly rate is 95 euro plus tax

 

The right tools makes life easy. I am not saying there will be faults but looking at your actual values you will see the wiper inputs. And outputs from the sam. Its a 5 min check and you will know exactly where to fix the fault.

 

Turn signal/wiper staulk?

Had similar issues with the wipers doing crazy things. Replaced the turn signal/wiper stalk on the left of the steering wheel, which resolved my issue.

 

Yes they can cause your issue. And your actual values will show this

 

I changed the turn signal/wiper arm, it didn't help
Did this problem with your car turn the ignition on or did it always? My car is when I turn the key to position 1 in the morning and the car is cold and after 10-15 minutes everything is back to normal.

 

When your issue happens in the morning is your switch for wipers in position 0 ?

 

yes wiper switch in zero position

 

Here's a thread on how the turn signal combination switch works.

I still suspect you have a shorted wire in the assembly.

 

This is why I say connect diagnosis tool. Get communication with SCM steering column module and look at actual values for combination switch.
You must see the actual value should correspond to your switch position. Report back with your findings
its not impossible that the steering column module is at fault too. The steering module provides the voltage supply for the switch. It also reads the voltage values from the voltage divider circuit inside the switch. So if your reference is wrong the outputs will be wrong too.

 

The weather has been 13-14 degrees for 3-4 days and my vehicle did not make this mistake.
It only does it when the weather is cold,
and when the weather gets colder,
the wipers start by themselves and then the stopping time increases.