In 2004 Rainer Zietlow founded his agency, CHALLENGE4 GmbH in Mannheim/Germany. He is a specialist in planning and executing worldwide automotive projects with Volkswagen cars. Rainer Zietlow's automotive success includes several long-distance world records and six Guinness World Records™. Its electric world record drives started in 2020, when Rainer Zietlow completed the longest journey to that date within a country in an all-electric vehicle. He drove in a VW ID.3 over 28.000 Km and visited 830 VW dealers in Germany within 65 days. One year later, in 2021 he undertook a similar tour in the United States, visiting 650 dealers by driving more than 58.000 Km within 97 days, doubling the record of 2020 record and setting a new Guinness World Record. In 2022, Rainer Zietlow set his second Guinness World Record in Bolivia. In an all-electric VW ID.4 GTX, he climbed the dormant Uturuncu volcano to a height of 5,816 meters above sea level. In 2023 he set his third Guinness World Record for crossing Canada from East to West with 18 charging stops. Returning from West to East he visited all 145 VW dealers with an over 29.000 Km long drive.