I did a search for this and found nothing so apologies if it has been brought up before.
When booking my car in for a service I was offered an Emissions Control Service for an additional £24.99. I was told this improves MPG, and emissions and also improves the power when accelerating. Apparently it cleans out the engine and exhaust system making it like new?

Has anyone else had one of these? Is it worth it or is it something you really don't need to bother with?
Thanks.
