2010 BMW 335i xDrive Questions

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I had a engine light come on at 70K, and then it went out. No issues. Then at 73K, my car started idling rough, the light came on, then went out, then it came on again with an additional service engine light. I had noticed the car jerking in 1st gear 2-3 x randomly. The car has lost power, etc. Got multiple errors from BMW diagnostic, 1.) mass air flow sensor failure 2.) coils? and 3.) valvetronic system with multiple cylinders misfiring. I am wondering if the mass air flow sensor and coils could be causing the valvetronic failure and that by replacing the first two will solve the last, making this repair much more affordable.
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