Rainer Zietlow achieved his second record recognized by Guinness World Records™ by circumnavigating the globe in a natural gas-powered car..

Rainer Zietlow, photographer Franz Janusiewicz, mechanic Florian Hilpert, and cameraman Falk Gunold were the first to drive once around the globe in a vehicle powered entirely by natural gas. The vehicle in question was a Volkswagen Caddy EcoFuel.

The tour started on October 23, 2006, in Hannover, Germany. The team's journey took them across five continents and 75 cities in 40 countries. There was a sufficient gas supply in Egypt, Iran, Pakistan, India, and Thailand, where company cars and taxi cabs must run on gas. An excellent network of natural gas stations was present in Argentina and Brazil, and it was also fairly well developed in some states in the U.S. The only way to cross Australia was by using a private filling station for forklifts.

The standard commercial vehicle was equipped with multiple auxiliary tanks and had an estimated range of approximately 3,000 kilometers. The fuel tank, which was included in the standard vehicle, was sealed in advance. On April 13, 2007, after 38,137 kilometers and 173 days, the record drive concluded at the Leipzig Automotive Fair.

For every kilometer driven, Rainer Zietlow donated about 10 euro cents to a branch of the aid organization SOS Children's Village in Bangalore, India, which he had visited during his tour.