2003 inspiriation ML270 parking sensor issue - Mercedes-Benz Forum

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post #1 of 5 (permalink) Old 03-22-2010, 07:45 AM Thread Starter
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Smile 2003 inspiriation ML270 parking sensor issue

My parking sensors are playing up. the problem first appeared when dropping speed. the front set alarmed intermittently. I then washed the car at the weekend. the parking sensors now alarm with audible pitch constantly and the two left and right red indicators on the front alarm panel light up. It all then times out and switches off. If I try and reset via the switch, it will again constantly alarm until it times out. I have put the car in reverse and it alarms both front and back (at the same time) panels the same( the left and right two red led's light up). I have checked for physical damage , but cant see any. Does anyone know if a wiring fault at the front bumper would cause this??
Any suggestions and notes on where the wires run would be very helpful.
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post #2 of 5 (permalink) Old 03-22-2010, 09:32 AM
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More likely a faulty sensor. You can hardly see physical damage specifically if the sensor has not been removed (unless an object had hit the sensor but this is not the only failure mechanism by no means).
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post #3 of 5 (permalink) Old 03-22-2010, 09:50 AM Thread Starter
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do you know of a way to isolate the front sensors individually?
Can I disconnect the front bumper wiring to just do a quick isolation check. eg. If I can disconnect the front sensor pack, It will at least prove the problem is sensor based. Do you know where the wires run?
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post #4 of 5 (permalink) Old 03-22-2010, 02:51 PM
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Get into Star Tek and download the circuit, it will show the wiring.

Good luck.

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post #5 of 5 (permalink) Old 03-26-2010, 11:02 AM Thread Starter
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I got under the offside front wheel arch and located what I think is a multi connector (that is used to bring all the front sensor wiring together before going to the main unit?). I cant get it undone, but I am convinced that this error is due to a connector somewhere , just by the nature of the problem and the preceeding issues. Preceeding the main issue I was getting the front parking sensors to alarm intermittently when I braked. It didnt happen all the time and the reverse ones worked fine. Does anyone know if the connector is as I state or has anyone got experience of isolating the problem/ knows where all the connectors are located?
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