I received a letter from Volkswagen over a year ago to say my diesel Passat was impacted by the emissions scandal. They said they would be in touch shortly about the recall - I've yet to receive any follow up.

The car has had some problems recently. The engine shakes and loses power, particularly in higher gears but also when in neutral and stationary in traffic. Intermittently, the engine management and diesel particle filter lights comes on.

It's been into the dealer and they've re-set parameters and lowered the soot levels etc. Car is running better now, but the engine is still not fully steady and I can feel a vibration, particularly after being left overnight. I've been advised that I should try and get Volkswagen to apply my software update as soon as possible as the symptoms my car is experiencing is likely related to the fix required through the software update, is this accurate?