W205 best diesel engine?
I am new to Mercedes and are looking in to buy an W205 with diesel engine due to traveling to work(about 100km every day).
Which is the best/most reliable diesel engine?
I have checked out most cars with OM626, OM651 and OM654 engines.
Which automatic gearbox is the best to prefer? 7G or 9G?
Equipment I think avantgarde is the best solution for me?
AMG line might have a little worse comfort?
Thanks for the help.


