Nothing. Everything has been OK until today!
Previously, I had a peugeot 405 SRi 1.9. It was a very good car, and I didn't want to change it. It had 242000kms when I sold it, and I've never had any problem. When I saw the 605, I thought it would be too expensive for me, but the price was reasonable, and I bought it. It was the best thing I did in my life.
It is really reliable. Sometimes, I could think I'm sitting in front of my TV (no noises, comfort), and sometimes driving a Formula One car because of the acceleration. The only problem is that the next car will have be better, and it won't be easy...
Information: 150 hp, less than 10 liters for 100 km. A dream!!
If you chip a 605 diesel you can get 155hp (180 if you buy an intercooler) and the consumption will be around 5 litre/100km.