Turning in my 2004 330ci in a few weeks. I have had a lot of fun with this car. As a consequence, the rear tires have taken on the appearance of drag strip slicks. Does anyone know whether it is better to replace them in advance or take the charge? Also, if anyone knows how much curb rash will be tolerated before you get charged, that would help too. I thought I was a better driver before I took a close look at those rims; I guess I've kissed a few curbs over the last 4 years. If necessary, and if it is more cost-effective, I want to consider replacing the rims and tires before lease-end. If not, I'll hand it over as-is. Any thoughts?