Hi Guys,

I picked up my C220 S205 AMG-line exactly 2 weeks ago.
I have a couple of times noticed that the collision assist light turned on while driving on a straight road in good conditions and no other car or obstacles nearby.

Yesterday driving home with my fiancé it all of the sudden beeped loud twice, on a completely straight road, and we were the only car driving on that road.

Today I called my dealer, he told me that he hasn't heard anything like this before. Okay, I thought maybe it was just something that will never show up again. But than today, with a friend, who has his own workshop, it beeped loud twice again with the collision light turned on. Again on a completely straight road, no cars, in daylight. And my car is always clean so thats not the problem.

After I finished work, I was going to my other company, to wash my car. As it was a little dusty (its a black car, and I love keeping my cars clean) Stopped at a crossing, where you can only turn right, theres a car ahead of me. He starts driving, I start following him, I quickly glance to the left and see that I have plenty of time to go as well. But when I look up the car ahead of me, with a couple of seniors in it. Decided to stop suddenly, and I don't have the time to stop. And I hit them from behind. And of course they also have a towbar to make things worse.

The impact happened at a very low speed cause I had time to slow down when I hit the brakes as hard as i could. I had a speed of approx 20-30 km/h before I hit the brakes. Whats bothering me now, is that the system beeped just before I hit the brakes, but the system should have prevented this from happening. It should have braked before I even had the time to react... It was my fault. But the system is designed for things like this, and its a big plus to have when buying a new car.

I'we been driving many new cars, and many of them with systems like this. Once it actually saved me in my VW CC 2013, but never has it been acting weird like this, warning for nothing on a straight road with no cars on a beautiful day. And that one time I didn't see the car in front of me panic-braking it actually saved me from a crash i my VW CC..

Luckily theres only minor damage to the car. But what do you guys think, should my dealer fix this for no cost? Since my collision assist must be faulty in some way?
Its not about the money, It will only cost a small fee to fix this, its just a principal I think should be applied here.. But maybe I'm wrong?

I'm so annoyed over the whole thing, as I said theres only minor damage to the car, luckily the front bumper is not damaged, it absorbed the crash. Just need to change the license plate, the license plate-holder, and the mesh / net in the grill under the mercedes star.

Somehow when you buy a more premium car like this, the systems should work. Today it could have prevented a very small accident from happening in broad daylight.

A video of how they explain the system works.

 

Have you got CPA? Where it actually brakes for you?

Ours beeps at us and does the triangle thing on dash but does not brake for us.

Personally I don't think you have a leg to stand on.

Btw someone scraped our car today and drove off



We think we know who it is so will confront them tomorrow.

 

Yes I have it, its standard on C-class, at least in Sweden.
You can also see on the video I posted the Mercedes Tech guy says its standard from B-class and up.

Ohh, thats a really ****ty thing to do. They could have at least admitted it if they accidentally scraped your car. Hope you'll get it sorted out!

 

Just checked video, that's a nice feature to have we don't have that in the UK it's probably an extra option.

 

Zero chance dealer should pay for this for you.... sucks that it didn't work as designed but in no way is anybody's fault but your own... unfortunately.

 

Yeah, as I said. It's not about the money, it's just a little frustrating on a premium car like this that the system doesn't even work on low speeds like this and "good conditions" with nice weather, clean car and almost a new car.

And yes you're right, it's my fault. And I know that. All I'm saying, that if the system would have worked as designed and also as promoted to us buyers, it could have helped me out.

Well well, at least I'm gonna have the system checked out, I don't want it beeping every now and then just cause it feels like it

 

My feeling is that you might be overestimating your speed at collision. The system has a minimum speed activation I believe of around 7KMH. So if you had stopped behind the car and then took off only the parking sensor would warn you until you got up to activation speed but would not have had time to activate the CPA. A 25kmh collision would have caused a lot more damage especially since you hit a tow bar. You would have certainly cracked your front bumper.

 

http://jalopnik.com/new-crash-test-s...lis-1576767776

 

I have the c200 s205 without the nanny pack and mine brakes. It did it yesterday when someone cut me up at the front leaving only inches between us.

 

You might be correct that I might be overestimating my speed a little bit. But it def was well above 7km/h, I have quite a bit of driving experience (even if I didn't show it here ) both on and off track as well, and I know the difference between 5km/h (almost walking speed) and 20km/h. At the time of impact it maybe was like 5km/h, but I had the chance to slam the brakes and brake for a couple of meters before I hit the car.

Well well, its as said before, still my fault. And no one else to blame cause I wasn't keeping the distance needed and I looked away for a short period of time. I was certain the driver ahead of me would drive out cause there was plenty of room.

Anyways, because of my mysterious beeps and warnings I'm gonna have them check out my system anyways. At least yesterday was a perfect opportunity for the system to work, good weather, a nice big SW infront of me for the radar to detect, and low speeds

 

Even MB state the system isn't 100% perfect, its just a helper, like all these assistance systems.

If you've damaged the front in any way, be sure to get it checked because numerous sensors could be misaligned now.

 

I have it on my car.