Pat, thank you offering your
Pat, thank you offering your first-hand positive experiences. Diesels do offer great drivability and highway mileage. I can't comment on a modern US-spec Mercedes diesel's comparability to the Corolla because Mercedes has no 2017 model year diesel cars for sale. Mercedes is presently under investigation for cheating on emissions in both the US and German market: http://www.motortrend.com/news/mercedes-benz-drops-diesels-for-2017/ I did recently test a modern diesel-equipped Jaguar XF 20D (similar to BMW 3 Series). My carefully-recorded primarily highway mileage, with as much cruise control I could use (mostly in NY state where the speed limit is 55 MPH) was 37 MPG. The diesel has the same performance as a Honda Accord base model or Lexus ES 300h. I carefully compare the green credibility and comment on the drivability of that car in the review. This week I have a Honda Civic 1.5-liter turbo gasoline version. It is half the price of the Jag, has better driveability, more room, and is much faster than the Jaguar. My mileage is 37 MPG. Here is a link to the review: http://bestride.com/reviews/new-car-reviews/review-2017-jaguar-xf-20d-awd-r-sport-a-focus-on-handling Our comments don't support links so you have to cut and paste.