Car Fax provided me with the important informations about car hystory for 2004 Mercedes SL600 that i urchased last year. The most important info was included in the maintenance records section. CarFax was able to provide me with the mercedes dealership all maintenance records for this car. Based on the Car Fax additional information and list of part s and major systems that were replaced ($35,000 value) I decided to purchase this car. It was the best purchase in my life. Other services like auto check, car proof, win data can not provide this type of info. Regards, Lub Mad Toronto, canada