530d ??? against 528i ???

Hello my “loves”, I’m just about to make a decision and hope for your support!!! I’m driving at the time of a 528iA….Automatics….18er…everything except Nav. My consumption is about 13,5liter so on average – a lot of city… So, now I could drive a 530dA M-package for 4 weeks….and was thrilled that goes great from below…..and that at about 8,8 liter diesel and was speedy on the road…..am now really confused have heard horror stories many times…from 100,000 pump here and there defective chips in the tank must be removed etc……so he should not “lift”….have you experiences? Can you encourage me? Don’t know what to do but the profitability has already convinced me!!!! Thank you in advance for your contributions!!!