E-Class (W212) 2010 - 2016: E 350, E 550
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Active Blind spot assist problem

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Old Jun 9, 2022 | 10:35 AM
  #1  
alecv's Avatar
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e350 cdi 4matik
Active Blind spot assist problem

Hello guys!

I hope you are good

Since I bought it, my car's active blind spot assist system has been inoperative. Recently I decided to check it and try to fix it. It appeared that both radar units in the rear bumper are broken (from the driver's side it is absent at all, and the connector covered by plastic from water, from the passenger - unit is destroyed by water and dust), so I ordered two used units, they should be In a working condition according to the seller.
After I mounted and connected them ABSA system is still inoperative, and I can't check its status by iCarsoft, it looks like it cannot see the block.
I want to debug it further, firstly - I want to learn, and second reason because with the situation in my country, I'm not at home and don't know the trustworthy service with enough competency.
So I'm asking for help. What and how should I check next? Any hints about wiring, fuses, and other areas are much appreciated.
Just in case VIN of the car is: WDD2120931A364449

Thank you!
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Old Jun 9, 2022 | 11:31 AM
  #2  
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'71 Pinto
Check harness also, sensors 'may' need commissioning see attachment.




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Old Jun 9, 2022 | 01:46 PM
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2012 E550 sedan 2019 E63 Wagon
IIRC the sensors have to be the same version, and manufacturing date as the old ones to work plug and play (not guaranteed). Otherwise as Konigstiger said they need to be mated to the car.
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