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Rear bumper sensors but no parktronic

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Old Jul 12, 2017 | 03:08 PM
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2015 C300
Rear bumper sensors but no parktronic

I have a 2015 C300 with the AMG Sport Package. I was just very curious as to what looks like 2 sensors in the rear bumper are? They're not on the painted part of the bumper like parktronic would be. I have no idea what these are.
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Old Jul 12, 2017 | 03:15 PM
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BMW e89 Z4 sDrive 35i & MB S205 C200 AMG Premium Plus
Originally Posted by markjax
I have a 2015 C300 with the AMG Sport Package. I was just very curious as to what looks like 2 sensors in the rear bumper are? They're not on the painted part of the bumper like parktronic would be. I have no idea what these are.
probably blanks.
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Old Jul 12, 2017 | 03:15 PM
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C350e
Can you post a picture?
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Old Jul 12, 2017 | 07:07 PM
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Those sensors are on every W205 vehicle (at least here in the U.S.). Sport package or not. It has to do with the Collision Prevention Plus and PRE SAFE system I believe. I had the car beep on me once when I was almost at a complete stop and saw a car approaching me unnecessarily fast from behind through my rearview mirror.
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Old Jul 13, 2017 | 06:53 AM
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2015 W205 C400 4Matic
Originally Posted by np6345
Those sensors are on every W205 vehicle (at least here in the U.S.). Sport package or not. It has to do with the Collision Prevention Plus and PRE SAFE system I believe. I had the car beep on me once when I was almost at a complete stop and saw a car approaching me unnecessarily fast from behind through my rearview mirror.
Not on my 2015 C400
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Old Jul 13, 2017 | 10:09 AM
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Originally Posted by GerritKw
Can you post a picture?
These are the sensors I'm talking about.
Attached Thumbnails Rear bumper sensors but no parktronic-rear-bumper.jpeg  
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Old Jul 13, 2017 | 03:45 PM
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C350e
Originally Posted by np6345
Those sensors are on every W205 vehicle (at least here in the U.S.). Sport package or not. It has to do with the Collision Prevention Plus and PRE SAFE system I believe. I had the car beep on me once when I was almost at a complete stop and saw a car approaching me unnecessarily fast from behind through my rearview mirror.
Those sensors (presuming they are no dummies) are ultrasonic sensors for the parking assist (either passive (4) or active (6). But they could be dummies that are plugged to fill the holes.
They are definetely not for the PRE SAFE system. That uses radar. Similar to the system in the front. That is integrated in the bumper.
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Old Jul 13, 2017 | 10:30 PM
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Originally Posted by markjax
These are the sensors I'm talking about.
I believe those plugs hide the rivets that hold that plastic pice in place. The rear parking sensors look like the following, I've circled them in red.


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Old Jul 14, 2017 | 12:29 AM
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C350e
Originally Posted by markjax
These are the sensors I'm talking about.
The parking sensors cannot be as far apart as Dapperstyle shows on his picture. In that case the sensors would miss a pole in the center.
There are 6 sensors front and rear, but since i have an estate a cannot do an exact compare.
It starts to look more like they are dummy plugs that fill the pre moulded holes in the part.
​​​​​​​Especially when you have only 2 holes in the rear.
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Old Jul 14, 2017 | 10:12 AM
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2014 C300
Originally Posted by GerritKw
The parking sensors cannot be as far apart as Dapperstyle shows on his picture. In that case the sensors would miss a pole in the center.
There are 6 sensors front and rear, but since i have an estate a cannot do an exact compare.
It starts to look more like they are dummy plugs that fill the pre moulded holes in the part.
​​​​​​​Especially when you have only 2 holes in the rear.
Maybe I am misinformed but if he doesn't have the plugs I circled in red he does not have any parking sensors at all.
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Old Jul 14, 2017 | 10:53 AM
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C450
Pretty sure they are for the blind spot monitors
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Old Jul 14, 2017 | 08:21 PM
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Originally Posted by supraken
Pretty sure they are for the blind spot monitors
The blind spot monitor radars are within the bumper on the sides.
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