hi, can you please advise me on which of these two would be the better option for reliability, comfort and mpg for my daily 100km commute. I'm looking to upgrade from a 2003 530d msport touring. https://www.donedeal.ie/cars-for-sale/bmw-5-series-2009/17361579?campaign=6 https://www.donedeal.ie/cars-for-sale/2010-bmw-520d-m-sport-business-edition-2yr-nct/17966971 I notice one has the timing chain 'done' also if this is a factor. Should I be worried about the miles? thank you very much