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Whilst not a m3/4 driver I have had this in my 2017 g30 540 and 2023 m550
I use it a lot on motorways and in traffic jams
The previous version was ok but could be better and it’s faults were maintaining a bias to the left of the lane and often but not always taking the exit lane off a motorway
The newest version (idrive 7) was improved and those faults have gone and have found it pretty much close to perfect really. Where it doesn’t work are simply where road markings are very feint or missing. It seems to be able to hang onto a lane even if there is only one side.
If you are finding that it cannot latch on to lanes at all or is erratic, an issue that popped up on the g30 forum was to completely reset the car by disconnecting the. Artery for a short while
After that it was back to its factory behaviour
Odd but it worked for the person concerned
Just mentioning in. Aad that’s your scenario
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