they came out in 05 i believe with the liberty.i've heard rumors of upper 30's mpg wise with a few mods.they do have torque converter issues though,make sure it's been changed.i have been looking to find a cheap one but to no avail.they seem to like to hold thier value.in 07 or 08 they came out with a grand wagonner with the 3.0 v6 blue-tec mercedes engine. they really hold their price.i'd sure like to try one for a week or two.heres one close to ya. http://www.autotrader.com/fyc/vdp.jsp?ct=u&car_id=279225734&dealer_id=343146&car_year=2007&rdm=1274014943177&lastStartYear=1981&model=&num_records=25&systime=&make2=&highlightFirstMakeModel=&start_year=2005&keywordsfyc=&keywordsrep=&engine=&certified=&body_code=0&fuel=Diesel&awsp=false&search_type=both&distance=200&marketZipError=false&search_lang=en&showZipError=n&make=JEEP&keywords_display=&color=&page_location=findacar%3A%3Aispsearchform&min_price=&drive=&default_sort=priceDESC&seller_type=b&max_mileage=&style_flag=1&sort_type=priceDESC&address=75208&advanced=y&end_year=2011&doors=&transmission=&max_price=&cardist=7&standard=false