Hi there. I got a E220 estate September 2017 (W213) which has been basically fine. On occasions it locked up when I was driving and I took it back. The first time they replaced a sensor but it did it again so I took it back in. They say that the sensors were set to go off from too far away and there is no fault with the car. They also say that if it happens again I would have to demonstrate it to a technician. So I have a car which has locked up when I am passing an articulated lorry at 60mph and it is my fault! Surely this is dangerous to have too sensitive sensors in the car or am I missing something?

Thanks for replying. The owner’s manual says that the brakes should only lock at the same time as the audible warning under “exceptional driving circumstances” but this has happened 5 times in normal conditions. My wife won’t drive it.

That’s interesting. I have found that when the car has been passing another car, lorry or object on the left side of the car, this is when the car has locked up. It seems to me that taking the settings away fro “early” is just hiding a fault in that the sensor is too sensitive and is dangerous.

Funny you should say that as the one on the passenger side was replaced when it was in in August. Every time the braking has been activated it has been when something was in my left hand side. Never on the right.

I’m not sure what driving style won’t trigger, but. I don’t have much confidence in a garage that just checks if there’s a fault (they say there isn’t) then changes the settings of brake assist to the late or close setting and tells me it’s fine. Surely if it is fine, they could leave the car on any setting?
I'm going in on Monday morning to have a drive with a diagnostic technician (I presume that’s a mechanic) so I will maybe find out more then.