RENNTech, Inc. is owned and managed by Hartmut Feyhl - widely recognized as the nation's foremost expert on Mercedes-Benz high performance. Born in Affalterbach, Germany, he spent twelve years at AMG Germany before being appointed Technical Director of AMG North America. During his time at AMG, he was instrumental in the development of the famous four valve "Hammer" engine, and also AMG's four cylinder racing engines. In 1989, he left AMG to form RENNTech, a high-performance tuner of Mercedes-Benz vehicles. The philosophy of RENNTech has always been to produce cars without compromise.