€25 million of investment was made in the factory in Burtenbach. The factory in Burtenbach became, with considerable investment, the most modern trailer factory in Europe. The Kögel Fahrzeugwerke AG in Ulm applied for the opening of insolvency proceedings in January 2004. This affected 1,186 employees. In 2004 this resulted in the take-over by Trailer Holding GmbH, in Munich, with the founding of "Kögel Fahrzeugwerke GmbH“, and the new company headquarters was in Burtenbach. Kögel is one of the largest commercial vehicle manufacturers in Europe and its basic product, the semi-trailer, offers the largest selection and flexibility in the commercial vehicle market. In 2006 the company produced around 12,000 vehicles, of which more than two thirds were supplied to other European countries. The around 1,000 employees at home and abroad were able to achieve a turnover of more than €275 million. In 2006 Kögel introduced the brands "Kögel MAXX", "Kögel foxx" and "Kögel Phoenixx". The "Kögel" brand took over the function of an umbrella brand. While the "Kögel MAXX" brand covers the previous product range and is marketed as the main brand with qualified sales and individual consultation, the "Kögel foxx" brand became the first commercial vehicle brand to be marketed exclusively via the internet. The "Kögel Phoenixx" brand is used for the introduction of innovative products, such as the first flatbed semi-trailer made from glass-fibre reinforced plastic (GRP). The "Kögel Big-MAXX" - which, since 2010 has been called the Kögel Euro Trailer - was introduced by Kögel in 2005 as their contribution to dealing with future transport volumes. The Kögel Euro Trailer is a semi-trailer which has been extended in length by 1.3 metres and consequently can carry an additional 3 Euro pallets. Since the end of 2005, 300 of these vehicles have been in use with special permits throughout Germany in special forwarding companies. An assessment by Prof. Henning Wallentowitzdes from the ika in Aachen attested to the extended trailer's excellent suitability for use in practice. For the final approval of this trailer, a change to the length of trucks in Europe will be required. An unexpected collapse in turnover caused Kögel to reduce its production capacity and 120 contract workers and 81 employees on a limited contract were made redundant in July 2008. After the redundancies, Kögel still employs around 1,360 people domestically and abroad. Since 2009: Kögel Trailer GmbH & Co. KG Even though Kögel was