C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Electrical problem?

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Old Jan 10, 2017 | 03:39 AM
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W203 220cdi 2002
Electrical problem?

Hello, i am new here and this forum has help me alot.
So i have c220cdi 2002. It has weird electrical problem, all interior, dashboard and outside lights starts to blink every 30-60 sec. There are no error codes and no battery warning on dashboard. What i already did to car is oil change, maf sensor, air filter, transmission oil change, battery change, tested alternator and everything is fine. So did anybody have this problem or know solution to this?
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Old Jan 10, 2017 | 08:18 AM
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I would take this to someone with a STAR scanner and see what they come up with.
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Old Jan 10, 2017 | 08:56 AM
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W203 220cdi 2002
First thank you for your reply, and sorry i forgot to mention that i already did that and was nothing wrong with car.
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Old Jan 10, 2017 | 01:05 PM
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Originally Posted by marcelsvj
First thank you for your reply, and sorry i forgot to mention that i already did that and was nothing wrong with car.

So you had it scanned with the Mercedes code scanner and it picked up nothing. I'm not doubting you but I find that hard to believe.
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Old Jan 10, 2017 | 01:26 PM
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W203 220cdi 2002
i know right. when i told mechanic about blinking lights he connected scaner and run all kinds of test for electronics. he tested radio, driver windows commands, rooftop commands, calibrated air fans etc. and everything was fine not a single error. it is not really a car breaking thing now, but it's very annoying and i have feeling that something else might break.
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Old Jan 11, 2017 | 08:41 AM
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You still have yet to answer my question.
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Old Jan 11, 2017 | 10:33 AM
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W203 220cdi 2002
sorry, mechanic only used this scanner.
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Old Jan 11, 2017 | 01:26 PM
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That should work. I am guessing there should be at least stored codes though. Might be worth your time to have the dealer scan it and get the print out from them.
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Old Jan 11, 2017 | 01:27 PM
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have you checked the SAM units front and rear for corrosion. Also have a look at the grounds.
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Old Jan 11, 2017 | 02:12 PM
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W203 220cdi 2002
no i have not checked SAM units or grounds.
i have appointed another check at mechanic in couple of weeks so will do what you said.
thank you for your time, when it's done i will post updates.
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Old Jan 30, 2017 | 12:24 AM
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1999 c230 kompresser





My hazzards wont stop flashing and more wiper related problems alarm keep blowing fuses
This sam unit bad ?
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Old Feb 1, 2017 | 04:45 PM
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THE C350
Are those pictures of your sam unit?
It obviously got wet and would need to be replaced as that corrosion is just asking for problems. Also would want to check out anything near that as well as the wires for similar damage.
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Old Feb 2, 2017 | 08:05 AM
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This sam unit bad ?
do you really have to ask?
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Old Feb 2, 2017 | 03:34 PM
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Kinda gotta ask its expensive to replace and im not a mechanic
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Old Feb 2, 2017 | 11:41 PM
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Ohk the sam was bad and the car is alive again thank you guys this sure was a project if anybody is have flashi g hazzards and wont shut off and wiper wont work or sum times and blows alarm fuses check the sam this worked for me
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