Ok, so the old D5 is 100 miles away form the big 160k. Its got a faulty injector clunky auto transmission and suspension knocks. The question is do you spend out £££ on fixing or pass over to the next guy cheap? The real question is "whats the cost to change"

The way that I look at it is, you have a number of factors to consider;

1. Purchase price of the current car
2. Lenght of time invested in the car
3. Age of the car
4. Service history completed
5. Pending service jobs
6. Pending repairs.
7. Realistic selling price
8. Cost of new vehicle
9. The way in which the new car is finance (Bank loan, cash, finance, lease, PCP)
10. The cost of the money to finance the purchace (APR, lost interest in savings etc.)
11. Costs to service new car
12. Depreciation of new car v's repairs of current car

Take all of these items into account, and then realize that it's better the devil you know, unless you can affort the brand new car....

Keep the S60 until the big 200k