Nothing whatsoever!
This car is seriously fun and easy to own, mine was a sporting S spec and has a very upmarket interior and the performance from the 1.1 litre engine is excellent! The grip is great and the handling is very fun indeed. Standard stereo with 4 speakers is also good but this car is a nightmare to clean!!
You have to carwash it, then jetspray it! The design is simply so old now and the plastic bumpers are all updates on previous Metros so it is very difficult to clean properly. Gearbox is excellent though.
Dealer really doesn't want to know (Douglas Grahams Windsor), they really don't want Metros on there on the forecourt!
I know what you mean by cleaning metros. Just do what I do, and don't wash it for a couple of months, then when you do get round to cleaning it, you have done a good job!