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Old Aug 7, 2015 | 09:19 PM
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Collision Prevention

Just got my computer back after a crash. I have searched and do not find the answer I need - has anyone set up a situation to see how the collision prevention works. I was thinking of putting a dummy in the road ahead of me and driving toward it about 30 miles an hour to see what happens? Anyone tried any thing like that?
Michael in Arizona
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Old Aug 8, 2015 | 12:50 AM
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Originally Posted by xrayaz
Just got my computer back after a crash. I have searched and do not find the answer I need - has anyone set up a situation to see how the collision prevention works. I was thinking of putting a dummy in the road ahead of me and driving toward it about 30 miles an hour to see what happens? Anyone tried any thing like that?
Michael in Arizona
Make sure you have a dash cam going, as we would all like to see that.
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Old Aug 8, 2015 | 08:59 AM
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A Mercedes made video,
What you're looking for but on a C Class
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Old Aug 8, 2015 | 06:13 PM
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Originally Posted by UrBusted
The videos are awesome demonstrations of how the collision prevention system works. I must admit that I have yet to put this to a test. There have been times when I'm driving along on a city street and there is a stationary vehicle stopped on a red light. I always apply the break before the system has a chance to be tested. I do have the distronic plus with pre safe.
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Old Aug 8, 2015 | 07:08 PM
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I can say this...

Very few people will have the intestinal fortitude to put these systems to the "test" in a live situation.

I have experienced both an autonomous brake event to stopped traffic in front (early in the morning - not awake :-) ), and a moron who decided to walk in front of my car. It is noy a pleasant feeling as all the other PRE-SAFE systems engage such as the emergency tensioning retractors in the seat belts.

My recommendation if you feel you must "test" the system, try it with something soft. With that said the object must have the same signature of the actual thing (i.e.: person or car).
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Old Aug 8, 2015 | 10:14 PM
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The films posted are great (thanks all). I want to try myself. I believe that the car will stop for a stationary person up to 30mph and over that it must be moving. I bought a blow up doll and will try to see if I can set this up on Monday. Ought to be a thrill.
Michael in Arizona
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Old Aug 10, 2015 | 04:46 PM
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Well a bit disappointed. I taped my blow up doll to a 2x4 and nailed that to a large flat board. got going about 24 miles/hour and hit the doll. The brakes did engage but not strong enough, I kept going about 2-3 foot (would have broken their legs). At 30mph I hit the doll and the brakes engaged but I still hit the doll hard enough to knock the doll into the air and shatter the 2x4 with pieces flying. My doll may have been a bit to small. While it is 5 ft tall about 1/2 the height is made up a very skinny legs. If I can find a larger doll or manikin I may try again. It is VERY hard to hit something and not also hit your brakes !
Michael in Arizona
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Old Aug 10, 2015 | 06:09 PM
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Originally Posted by xrayaz

Well a bit disappointed. I taped my blow up doll to a 2x4 and nailed that to a large flat board. got going about 24 miles/hour and hit the doll. The brakes did engage but not strong enough, I kept going about 2-3 foot (would have broken their legs). At 30mph I hit the doll and the brakes engaged but I still hit the doll hard enough to knock the doll into the air and shatter the 2x4 with pieces flying. My doll may have been a bit to small. While it is 5 ft tall about 1/2 the height is made up a very skinny legs. If I can find a larger doll or manikin I may try again. It is VERY hard to hit something and not also hit your brakes !
Michael in Arizona
Wonder how your test compared to the one by Motortrend. Worked great there...

Here is a link for the video. Should start somewhere around 9:50. https://mbworld.org/articles/motor-t...s65-amg-coupe/

Also, Collision Prevention works a bit different than Pre-Safe Brake with Distrionic Plus

Last edited by Wolfman; Aug 10, 2015 at 06:16 PM.
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Old Aug 10, 2015 | 07:06 PM
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Originally Posted by MBtech1098
Very few people will have the intestinal fortitude to put these systems to the "test" in a live situation.
And those who do should not be covered by insurance..........
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Old Aug 10, 2015 | 07:41 PM
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Thanks Wolfman. I do have distronic plus and thought the car would stop before I hit the doll. Again, maybe it was just me.
Michael in Arizona
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Old Aug 10, 2015 | 08:36 PM
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Originally Posted by xrayaz
Thanks Wolfman. I do have distronic plus and thought the car would stop before I hit the doll. Again, maybe it was just me.
Michael in Arizona
Why didn't you take a video
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Old Aug 10, 2015 | 10:08 PM
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Jenz - no video cuz no web cam and was too involved to use my iphone.
Michael in Arizona
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Old Aug 11, 2015 | 07:48 AM
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I should have looked at the functions descriptions because I'm not sure about the implementation of the current safety features. In the video earlier in this thread only the Distronic short range radars were illustrated. I thought the stereo cameras should play a role too.

The point is that any test with a plastic doll, filled with air, will not be seen at all by the radars. The doll should be covered with a metal film or something else that makes it look like a real person. For the stereo cameras it should not make any difference if the doll was made of plastic and filled with air.

Anyone studied which sensor has the main role for each scenario?
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Old Aug 11, 2015 | 02:36 PM
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Thanks Diesel Benz. I think I did read that the stereo cameras play a role. All the videos show the manikin with clothes. I will try again Fri or Sat with some clothes on my doll and see if it makes a difference.
Michael in Arizona
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Old Jun 18, 2016 | 11:15 PM
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I'm bumping this thread. I would looooove to see a video of someone doing this. I'll for sure do it when mine arrives.

Originally Posted by xrayaz
Thanks Diesel Benz. I think I did read that the stereo cameras play a role. All the videos show the manikin with clothes. I will try again Fri or Sat with some clothes on my doll and see if it makes a difference.
Michael in Arizona
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