I have a 141 Opel Corsa Excite with 165km and I want to trade in and get something newer with less mileage my budget would be about €12k max which would include the trade in price. I have been offered 4K, 5K and 6K from car dealers for the car. I do 23km per year and on the motorway most weekend but I sometime find that when I am overtaking even with my foot to the floor my car is slow to respond. I love my heated seat but I know they are not common in small cars. I want to know if I should go for a diesel and if so what type? Do you know if I could heated seat fitted after I buy a car without them? thanks