What's in the issue

When a Diesel Particulate Filter (DPF) fails to self-clean, what options do you have apart from costly replacement? We show you two cleaning methods. Also: How to change the oil and filter on a Haldex Generation 4 AWD system used by VAG, Volvo and Ford to name a few. Testing six Bluetooth engine fault code readers that operate via a smartphone or laptop. Servicing a 2015 BMW 335d xDrive and looking at buying a Kia Stinger – plus much, much more.