This is a standard problem with the Ingenium diesel engine in the Evoque because the DPF is located too far from the engine to passively regenerate. The car has now been re-designed and hopefully this fault will have been eliminated. In theory you have a case to reject the car as "not of satisfactory quality" and "not fit for the purpose you told the dealer you wanted to use it for". That's the theory. Law here: www.honestjohn.co.uk/faq/consumer-rights/ History of the problem with the Evoque here: www.honestjohn.co.uk/carbycar/land-rover/range-rov.../ But if the dealer does not accept your rejection, your case will have to go to the full County Court and you could be in for significant legal and court costs that, even if a ruling is made in your favour, you might not be able to recover.