![]() ![]() It is a personal decision, but I know just how far we are away from autonomous cars in reality, and I know enough about systems not to put my life into the hands of any computer programmer. I've spent forty eight years driving while managing to keep in lane and change lane safely, without any problem. That is completely different to applying the brake to make the car slew in the other direction. Which takes priority: lane assist or braking assist? If lane assist shoves you back in behind the vehicle in your lane, you might well have a real problem.ĭistronic works in a different way it steers the car. For example, swerving suddenly to avoid a vehicle entering your lane in front of you. There are all sorts of situations where the logic in Active Lane assist is unknown. Anything that contributes to road safety is usually a great thing but the MB system, from my experience (and obviously numerous others online), is bordering on dangerous in certain circumstances. ![]() Yes, before anyone suggests, I know it can be turned off, but a stop for fuel and it’s so easy to think it’s still turned off, forgetting it defaults back to on. If you don’t know what may trigger it, apart from the obvious, as described in the manual, then how can you know when to expect it? For example, travelling through motorway roadworks at 50mph, often with another car, or quite likely a 40 ton lorry two foot from your rear bumper and all the random burnt off white lines and tarmac seal lines, would you want the system to trigger and start braking randomly? Why is the MB system so unpredictable while the similar system in my other car, same year, different manufacturer, so predictable? They cannot explain all the circumstances where the system will activate and as for someone’s comment that we knew what we were getting when we bought the car, well I don’t think that is the case. I appreciate that there are many factors involved in the car triggering the assist features but having had the car activate on three occasions and MB can offer no explanation as to why, always taking the corporate line that the system is foolproof and therefore it must be solely my fault. I have to say I am very surprised by several peoples attitude towards MB safety assists, I can’t help but wonder if they have any actual experience of these assists when they activate for no obvious reason. (It'll still startle you, but at least you'll know what's happening and why). These sorts of drivings aids are never going to be infallible - so when getting your car, it pays to read the manual on all the safety systems your car has, so that when one is triggered it doesn't come as a complete shock. I've also had it happen on the M25 where a low sun position caused enough glare from a line of tar filling a long crack in the middle of the lane to be considered as a solid white line. Unfortunately the later system can be a little over-sensitive - I've had it trigger for a line of water running down the road going uphill and lit at the right angle by the sun to be considered as a white line. If you start to stray over what the car thinks is a solid while line, it'll apply brakes to the other side of the car to move you back into lane and prevent you from running off the perceived edge of the road. Click to expand.There are two levels of active lane assist - if you stray over a lane marking (dashed lines) you'll get three sets of vibrations through the steering wheel as a warning. ![]()
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