"This website provides conversion details for a specific car and specific conversion kit. It is meant to supplement the Greasecar.com instructions. There are also some links to good general information about conversions. This conversion information should work for a 1990, 1991, 1992 and 1993 Mercedes 300D. I decided to do a 15 gallon square tank in the trunk. This is so I can keep the spare tire. I converted this car while I had a second car and then sold the other car. You could do the conversion while it's your only car if you plan really well and do it in stages and on weekends."