 vehicle will not operate in any city ,urban , metro  environment .  DPF will not re-gen and  re-gen failier's dumps diesel into crankcase to mix  w/ motor oil. My sprinter 2015 after 18000 miles never needed a drop of replacement oil (burn-off) in fact  my engine  had 17 gallons of fuel mixed with oil , before m/b bought it back 11/17/2016 lemon law case # 2016-0378/stp  florida court . Every  600 miles or so  high oil level lite and buzzers come on  and you have to drain  fuel/oil mix 2 or 3 quarts  and then go another 600 or so  . 47 day's of loaner cars  then said it was my city driving was the problem . State of fla. asked m/b  lawers  how could they  sell a vehicle to  anyone that doesn't live in Montana , cause that's the only place this  could possibly work !  this whole DPF system is junk