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W204 2008 C300 4matic Turn Signal Relay

Old 12-11-2018, 11:20 PM
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W204 2008 C300 4matic
W204 2008 C300 4matic Turn Signal Relay

Could anyone let me know which is the relay for Turn Signal (the one, that makes flashing pattern) or is it done via somekind of Bimetalic strip? I assume the Steering Wheel lever is just a switch, that suppose to engage the relay to blink the bulbs? Looks like mine freezes during cold nights, and when I'm doing "Change line Turn Right - 3blinks" it flashed "Left" fist and then turning on, the "Right turn". If I let the car blinks "Left" for few mins (I assume the relay gets warmer, as current goes through it) it works kind of fine.
Old 12-29-2018, 11:14 PM
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Originally Posted by angrybober
Could anyone let me know which is the relay for Turn Signal (the one, that makes flashing pattern) or is it done via somekind of Bimetalic strip? I assume the Steering Wheel lever is just a switch, that suppose to engage the relay to blink the bulbs? Looks like mine freezes during cold nights, and when I'm doing "Change line Turn Right - 3blinks" it flashed "Left" fist and then turning on, the "Right turn". If I let the car blinks "Left" for few mins (I assume the relay gets warmer, as current goes through it) it works kind of fine.

I got the same issue, I tried to look it up but I could not find anything to help me out. Maybe someone who had this issue and fixed can help us?
Old 12-30-2018, 12:55 AM
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2008 C350 Sport 4Matic Swap
I had this issue last winter but only on really cold night, (-20C and lower). I sprayed some electrical cleaner down the switch not really knowing if it would help but it seems to have fixed it. Didn't do it again last winter nor has it acted up this winter and we've had some cold nights here in Canada.
Old 01-01-2019, 09:20 PM
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W204 2008 C300 4matic
Originally Posted by ltwargssf
I had this issue last winter but only on really cold night, (-20C and lower). I sprayed some electrical cleaner down the switch not really knowing if it would help but it seems to have fixed it. Didn't do it again last winter nor has it acted up this winter and we've had some cold nights here in Canada.
Hi, do you mean the switch that is located inside the steering wheel, just behind the airbag?
Old 01-01-2019, 09:31 PM
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2008 C350 Sport 4Matic Swap
Originally Posted by angrybober
Hi, do you mean the switch that is located inside the steering wheel, just behind the airbag?
The actually turn signal lever, I took the plastic covers off and cleaned it.
Old 01-13-2019, 11:02 AM
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Did you have to take out the steering wheel to get to the lever ? or just the top or bottom cover ?
Old 01-13-2019, 11:03 AM
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2008 C350 Sport 4Matic Swap
Originally Posted by Bokica
Did you have to take out the steering wheel to get to the lever ? or just the top or bottom cover ?
Just the covers.

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