choosing new car

I have €40,000 to €50,000 to spend on a car. What would you advise? I have a 1998 BMW 520i with 106k miles since new.

I have a 2008 Volvo SE 1.8 Flexifuel and I'm thinking of trading it in for 2012 Ford Mondeo or even an all-new Mondeo. How much should I expect? There are 107,000 miles on my current car.

What is the Mazda6 like? I'm trading in an Audi A4. Am I mad?

What is the difference between the Volvo V40 and the V40 Cross Country?

How much is my 2008 Toyota Auris worth? Should I trade it for a Kia Rio?

Is the new Volkswagen Golf Plus worth buying?

How good is the Renault Kangoo passenger model?

How reliable are the Skoda Yeti 1.6 diesel and SEAT Toledo diesel (new model)?

I'd like to trade in my 2007 Mazda3 1.6 petrol and change to a diesel engine. Fuel economy and lower tax would be important as I cover around 360 miles a week mostly motorway driving. I'd like a roomier car in the back for two children and a bigger boot. Was thinking of a diesel car or SUV. What would my Mazda3 be worth on trade-in?

Is the 2.2 diesel engine powerful enough for Mercedes-Benz M-Class?