12-13-2018, 09:23 AM | #1 |
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What is the purpose of the seat belt tightening right after we start driving?
Searched the forum but couldn't find an specific answer. Anyone know the engineering or safety purpose of the apparent seat belt pre tensioning that happens as you first start to drive? Some call it a "tug". I know some systems do a special pre-tension upon an impact, but I have not experienced this feature in any other car so far. --Bob
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12-13-2018, 10:31 AM | #2 | |
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I believe it is a way for the Dynamic Safety system to preset the tension level for use in in the event of an impact.
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12-13-2018, 12:00 PM | #3 | |
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12-13-2018, 06:19 PM | #4 |
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Exactly. In emergency braking, I have experienced the belts tighten to this preset point, anticipating impact. My 2014 E350 was the first car I had which did this. It is a real safety improvement in an accident, designed to work with the airbags to improve your survivability. Having worked in several ER's, not sure why one would want to disable it.
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12-13-2018, 10:56 PM | #5 |
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12-14-2018, 09:16 AM | #6 |
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Exactly.
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12-14-2018, 10:06 AM | #7 |
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Thanks to all for the answers. Kind of like I assumed, a pre tensioning to prepare ahead of time for a possible event. I don't think I would want to disable the system but out of curiosity, how does one do it? --Bob
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12-14-2018, 11:55 AM | #8 |
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Hi, does the pre-tensioning always adjust at the same level of strength? I noticed on my car, sometimes the pre-tensioning is tight, while at other times it's fairly weak. Just curious. Thanks for any input!
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12-14-2018, 11:58 AM | #9 |
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I’ve noticed the same. Mine has been fairly week lately
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12-14-2018, 12:11 PM | #10 | |
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12-14-2018, 12:36 PM | #11 | |
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I knew someone was gonna make an "eating behavior" joke! Actually, that thought did cross my mind. D'oh! Glad I'm not the only one that's experienced this. Yeah, tried just about everything, leaning forward, sitting back, speeding up right away, etc...just never figured out why it feels like squeezing all the air out my lungs while other times it's barely a nudge. Maybe I will try the salad approach! Thanks all! |
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12-14-2018, 12:36 PM | #12 | |
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12-14-2018, 12:51 PM | #13 | ||
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The feature doesn't bother me but my wife hates it. With that said, I'd never disable it because it is a good safety feature. |
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12-14-2018, 06:48 PM | #14 | |
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12-15-2018, 07:58 AM | #15 |
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I like it. Kind of feels like my car giving me a hug every morning.
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12-15-2018, 11:43 AM | #16 |
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Yeah mine doesn't like it either. I am kind of indifferent and agree I certainly would not disable it if I even could. --Bob
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12-17-2018, 02:36 PM | #17 |
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Its there to totally mess up the shirt / suit that was just pressed!
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12-17-2018, 05:16 PM | #18 |
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12-17-2018, 06:12 PM | #19 |
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12-24-2018, 03:47 PM | #20 | |
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I don't mind the "tug" when it lets go, but I can't stand it when it doesn't. |
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12-26-2018, 11:58 AM | #21 | |
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12-26-2018, 12:12 PM | #22 | |
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