Parking sensors
Discussion
Hi, I know I only post if I have an issue but I probably spend an unhealthy amount of time reading the numerous threads. I have tried to search but not found the answer I want. My father bought a second hand ML320CDI yesterday, great first impressions but the parking sensors are playing up. Any help would be greatly appreciated. The sensors turn themselves off, when you switch them on we get a beep and two red lights appear on the front dash sensor for about 20 seconds and then the sensors go off again. Thank you
no idea whether this will help, but on a BMW apparently you are meant to be able to tell which sensor is duff because when engaged, the faulty one will click. you need someone holding the clutch down in reverse (and handbrake on for safety) and another to put an ear close to each sensor
yellowbentines said:
Suffered the same myself a couple of months back, diagnosis was faulty sensor, lucky the car was under warranty as I was told the new sensors come in primer only so you need to get them painted to match the car which is a pain.
When I had a faulty rear PDC sensor on my Mini the dealer told me which one it was and I got one off eBay, gave it a quick rub down with fine wet and dry paper and then used an aerosol of the colour and laid down a few coats. Once dry fitted it to the car and you cannot tell the sensor is new. The biggest pain is getting the sensor out of the bumper and this sometimes requires removal. In total cost me about £20 as I got the sensor for almost nothing and the paint was from BMW so it was fairly pricey for a can.
Had similar problem on my older model 03 ML270, when the system detects a fault with one or more of the parking sensors it defaults to "on" and buzzes with all red lights on, as soon as you slow enough for it to be activated. It sounds like the newer system turns itself off which is probably less annoying.
My local garage diagnosed that a couple of sensors had failed at the front and the rear, the problem with replacing them was that apparently it was a bumper off job and they were about £60 each (from memory) so quite expensive when adding in labour.
The suggestion was to reset the software and see how we got on, we did this and the system now functions more or less fine - except that it obviously does not detect via the failed sensors so you have to be a bit careful when parking! I am ok with this though, it is an 8 year old car so spending around £300 or £400 fixing the problem was probably not sensible, a different case with a newer car perhaps.
My local garage diagnosed that a couple of sensors had failed at the front and the rear, the problem with replacing them was that apparently it was a bumper off job and they were about £60 each (from memory) so quite expensive when adding in labour.
The suggestion was to reset the software and see how we got on, we did this and the system now functions more or less fine - except that it obviously does not detect via the failed sensors so you have to be a bit careful when parking! I am ok with this though, it is an 8 year old car so spending around £300 or £400 fixing the problem was probably not sensible, a different case with a newer car perhaps.
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