Clarkson is trying to blame the bus driver for him kerbing the wheels so he doesnt lose face ( he misjudged it), if you look at the number of words put down in relation to the actual information about the X5 you can see it is about entertainment not factual reporting.
I would also like to know who these people are that said the E53 drives better than the E70, it was probably his mum when she was filling his hot water bottle for him, before she tucked him up in bed.