Mokka. The Bitter Adam (marketed as "Adam by Bitter") has been produced since 2013. Production of the Bitter Mokka (marketed as "Mokka by Bitter") began in 2016. The name was changed to Mokka X (marketed as "Mokka X by Bitter") in late 2016 along with a facelift, just like the Opel and Vauxhall versions. Current Bitter currently produces luxury versions of the Mokka/Mokka e, Corsa GS-Line, Grandland X and Insignia models. Prototypes and concepts In addition to the series models, Bitter continued to present studies, some of which were even ready for series production. Despite repeated attempts, some of which were promising, he never managed to go into serial production again. Bitter Blazer (1976) The Bitter Blazer was a modification of the Chevrolet Blazer with a new, Europeanized front end, which was characterized by a horizontal radiator grille and light units from the Opel Admiral B. In addition, there was a refined interior. It followed the concept of the Monteverdi Safari . The vehicle remained a one-off. Bitter Super Aero (1978) The Super Aero was a compact two-seat sports car based on the Opel Kadett C. Bitter Rallye GT (1984) The Rallye GT was a compact two-seat sports car based on the Opel Manta. The vehicle had a Targa-style removable central roof panel and was developed by Bitter and Isdera . Erich Bitter predicted a sales price of DM 40,000. However, he refrained from series production because the supply of technical components was not secured in the long term. Bitter Type 3 (1987) The Bitter Type 3 was a 2+2 seater convertible introduced in 1988 as the successor to the SC and primarily intended for sale in the United States . The technical basis was the Opel Omega A, whose floor pan was shortened by 35 millimeters. Bitter designed the body himself; it featured pop-up headlights and the round taillights of the Chevrolet Corvette C4 . A 3.0 liter six-cylinder from Opel was provided as the drive, the output of which was specified in a sales brochure as 177 hp. A total of five prototypes were made; the bodies were built in Italy at CECOMP. The first prototype was equipped with the 3.9 liter six-cylinder from the Bitter SC, the later models with the 3.0 liter engine. Initially, it was planned to organize sales in the United States through the Isuzu dealer network . It should also have been considered