I would have to agree with sleepyhead. I have the cla250 with night package and it is hard to see out off but I did opt for the blind spot alert. Recently got given a A45 to drive with all the options you mentioned and the only one that didn't drive me nuts was the blind spot alert. The others are really not that refined in my opinion, the line detect made it hard to overtake as it try's to keen you in the lane, so you feel the steering is slightly fighting you and the distronic absolutely sucked, when you set the cruise control you want something nice and smooth, this function is far from it! It feels like the brakes go on when you get too close to the car in front then after this the accelerator feels like it is pressed to hard, so you are constantly slowing then speeding up. But once again this is only my opinion and you might like the way the options work for you and your style of driving.