Originally Posted by adc
Well, DI seems to come with some unpleasant side effects for long term reliability, such as carbon build -up. I think i read that Benz is introducing a hybrid DI-port injection system to eliminate the carbon buildup problem.
I've heard the horror stories from a few models. However, the number of cars and models using this is HUGE. For example every V6 Ford Ecoboost has DI. I suspect it was somewhat of an isolated incident(s).