W204 parking sensor numbering

Styllrunning

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Hi, my 2012 W204 C220 (SE facelifted model with LED running lights) has a fault with the parking sensors, with the two red lights coming on with the parktronic when I engage the gears. Its been intermittent, and normally clears after heavy rain, so its been irritating rather than a major issue.

I recently had an engine management warning light come on, and as they had to run diagnostics for this I asked them to check the parking sensors. Based on this I know its parking sensor 4.

The dealer wanted over £300 to replace the faulty sensor, as the front bumper has to be removed to replace it. As the sensor itself can be had from Amazon for less than £20, I'd rather do it myself and save £300.

Can anyone tell me which sensor on the front is Sensor number 4?
 
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Styllrunning

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Thanks David, thats jsut what I was after (and amazingly quick!)
 

John Laidlaw

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He doesn't hang around! Power of the forum...
 

mark1999

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hi I also have a fault with my parking sensors now after having a new bumper fitted it was all working perfect but now the problem is with just the two red lights coming on then system turns it off after 20 seconds. I have changed all the parking sensors for new ones and it is still happening. do they need resetting or something please any ideas. help
 

mark1999

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hi sorry it is a 2011 W204 C180 SE facelifted model
 

Chrishazle

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S204 2008 C220CDI Elegance Estate Auto, 2008 R171 Facelift SLK280
Hi Dave I have a 2013 e220 cdi facelift model was wondering if you knew which sensor is no.10
Regards
Brendy
Looking at the diagram Dave posted, looks like No. 10 is rear NS outer.
 
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