Hi Brainstrust,
My 2015 MS with AP1 plus MCU3 and all other SW upgrades was just on a 4,000 km cross-country trip. Flawless and enjoyable performance as usual EXCEPT that on completely straight sections of two-lane roadways (90-100 kph/55-60 mph) with rolling crests the autopilot began to exhibit abrupt veering behaviour. Even a couple of times on a rolling 4-lane section of motorway. These were short crests, but just high enough that one could not see the other side of them. In the past, the car would tend to keep its direction rather than veer off course.
Mostly the veering was towards the gutter (off the roadway) but a few times in the other direction towards the oncoming lane. I kept checking that it was not an anomaly (even did a dual button reset) but it was repeatable dozens of times and required quick intervention to correct it - essentially overriding the AP. The AP did not disengage by itself or offer any audible or visible warning - except when I took back control.
I have driven this car for over 40,000 km and have never experienced this behaviour before. The windscreen was not dirty and does not look visibly pitted in the lens area. The behaviour of the autopilot in other circumstances appears normal.
So, can this be a failure due to a more recent SW update or is the camera itself likely to be the cause? Or something else? There is clearly a safety issue here in my opinion. I will, of course, book for a service but I would like to be prepared should others have encountered and resolved this issue. (on SW 2022.8.2)
My 2015 MS with AP1 plus MCU3 and all other SW upgrades was just on a 4,000 km cross-country trip. Flawless and enjoyable performance as usual EXCEPT that on completely straight sections of two-lane roadways (90-100 kph/55-60 mph) with rolling crests the autopilot began to exhibit abrupt veering behaviour. Even a couple of times on a rolling 4-lane section of motorway. These were short crests, but just high enough that one could not see the other side of them. In the past, the car would tend to keep its direction rather than veer off course.
Mostly the veering was towards the gutter (off the roadway) but a few times in the other direction towards the oncoming lane. I kept checking that it was not an anomaly (even did a dual button reset) but it was repeatable dozens of times and required quick intervention to correct it - essentially overriding the AP. The AP did not disengage by itself or offer any audible or visible warning - except when I took back control.
I have driven this car for over 40,000 km and have never experienced this behaviour before. The windscreen was not dirty and does not look visibly pitted in the lens area. The behaviour of the autopilot in other circumstances appears normal.
So, can this be a failure due to a more recent SW update or is the camera itself likely to be the cause? Or something else? There is clearly a safety issue here in my opinion. I will, of course, book for a service but I would like to be prepared should others have encountered and resolved this issue. (on SW 2022.8.2)