I am trying to decide if I should extend the maintenance on my 2006 M5. It has 47,000 miles and has new front brakes. I am sure it will need rears before I sell in a few years and I am wondering about the clutch. The dealer said the clutch is very expensive.
The extended maintenance is $3495.00 two years or up to 100,000 miles.

Does anyone have an idea of how long a clutch should last or has anyone had any other costly items that needed to be fixed that I should be aware of in order to help decide what to do?
Thanks.