bfedwards 
2010 BMW 5 Series Sedan 535i xDrive 4dr Sedan AWD (3.0L 6cyl Turbo 6M)
oh the problems i've seen
 The direct fuel injectors have introduced a new and not insignificant problem to the engine. Coke formation is extensive. Those engine lights that start to light up anytime after say 50K miles are likely due to carbon buildup in the cylinders with the sensors going crazy as a result. Big engine lights , little engine lights, single and multiple cylinders dropping out at highway speeds, LTFT abnormalities, O2 sensor malfunction codes, cylinder misfiring codes, and on, and on.You can spend many an hour chatting with your local mechanic getting to know all about his kids and their little league activities before you get to the necessary therapy: walnut shell cylinder coke blasting! ($800!)