First of all, I very much apologise to those of you who hate "should I sell" threads, but here is my situation, and I hope someone else might be able to empathise. When I bought my A4 2.0 170 DPF in 2009 (with 40K on the clock) I fully intended it to be a "keeper", and was under the illusion of German reliability, and so intended to push the car way past 100K miles for at least 5 years plus. However, just over 3 years later, I've had a string of reliability issues including: Parking sensor failure Electrical relay fault Injector failure Exhaust pressure sensor failure EGR valve failure Fortunately, the Injector problem cost me nothing after VOSA forced Audi's hand to do a recall, however it was a stressful period and I've now spent way past Â£1K on fixing other faults. I'm now worried that in the long-run, the DPF itself and the Turbo may pack up, given the record thus far. With Â£170 a year road tax, fuel, insurance and servicing, I've calculated that at the current rate, it may cost me nearly Â£10K to keep this car on the road over the next 3 years. On the other hand, "downsizing" into a smaller, and much more efficient diesel car (like the crop with zero road tax) I calculated might cost around Â£5K to run over the same period. However, with the car I was eyeing up, I'm probably looking at around Â£7K cost-to-change (a nearly new Ford with a warranty). So, for at least 3 years, that actually cancels out all of the cheaper running costs! I guess it might be financially better to trade into a older and cheaper used model than the one I was looking at.. however such a car would have a poor/non-existent warranty and might be a lottery to find a good one. Anyway, sorry for rambling on. If anyone has had any thoughts on the same thing, I'd be grateful for any sensible and constructive replies. Thanks.