That’s a tricky question as there have been so many updates to the door parts and sensors along the way. Things to look out for are evidence of rubbing on the inside of the door posts and wheelarch where the FWDs close. Also pay attention to the door alignment on the outside. Any sign of significant misalignment and/or rubbing would suggest it hasn’t been fully sorted. Also listen out for creaking and popping noises when the FWDs open and close. It should all be smooth and silent apart from the whir of the door motors. Check panel gaps in general, especially around the front light clusters, I’ve seen some bad examples in that area with the light clusters sticking out at the rear side edge. Check the front hood is not dented from a careless owner pressing it down as it is very fragile. If it has powered rear seats, check all the motors are working. Also check that the rear row seats fold correctly on 7 seaters as it was common for them to get stuck. Check that the front seats don’t rock on their mounts, I’ve heard that reported as an issue on some cars, but not sure if that was an S specific issue or not. Easy to check anyway! Worth checking the heaters and a/c too, both front and back - you often hear reports of missing ducting or poor rear heating/cooling performance. When driving, look out for a shudder on full bore acceleration. This seems quite a common issue on standard ride height. Lowering it tends to reduce the problem. Check for even tyre wear too, again quite common to see cars with excessive edge wear, inside or outside. On the sound system, check all speakers are working and no rattling of speaker grilles etc. Easiest way to do that is to move the sound balance around the car to isolate each corner. Check the touchscreen display is clear, with no colour distortion at the edges. Some have been replaced due to yellowing.