Am new to this and I need help badly. I have a 525d m sport remapped the engine been driving for around 2 years like that n no problem until now. I suddenly lost power and now a beeping sound from the actuator I think. And also smoke. I have changed the battery as the battery looks like it needs replacing and the turbo works fine. The only problem is the beeping sound and now smoke from underneath the car. Another forum or on this one somewhere someone has had the same problem and replaced the turbo but has made no difference. Please can someone advise me if they had a similar problem or the same and what they did to fix it n cost. Thanks Maz Karim. Blyth Northumberland.