Hello, please help with a recent problem with my lci 3litre diesel E61 auto.I tow a caravan and after approx 5 miles the engine 'coughs' several times then cuts out! sometimes restarts before coming to rest but more often refuses to restart for several minutes. The following display appeared; DBC failure, Drive control system, Start assist inactive. - Cruise control no longer works and now message PDC inoperative.
Now starting to experience same issues when driving normally.
Fuel filter changed, temperature high 80's, gearbox oil change 5000miles ago. Starts instantly, (new glow plugs) idles smoothly, accelerates well, revs well, turbo cuts in as normal.
Not sure where to start.