Isdera. Isdera or Ingenieurbüro für Styling, Design und Racing (English: Engineering Company for Styling, Design and Racing) is an exclusive small-series car builder and automotive service provider. The company was founded and formerly based in Leonberg, Germany. Each high-performance sports car was hand-built by a small team of craftsmen. Each vehicle was custom built for its original buyer.

History 
In order to seek a job at one of the automotive companies of Germany, Eberhard Schulz built his own car in the garage of his home in 1969 called the Erator GTE. He drove the car to Porsche's and Mercedes-Benz's headquarters and was subsequently offered a job at Porsche in the design department in 1970. In 1978, Schultz left Porsche and joined the b&b company where he would go on to design the Mercedes-Benz CW311 concept which was touted as the successor to the Mercedes-Benz 300SL. The concept was built and promoted by b&b and had Mercedes badging after approval from the manufacturer.

Isdera was founded in 1982 in Leonberg, Germany with the intent to put the CW311 into production after a deal with Mercedes-Benz. Its first car, called the Spyder which was an open top sports car based on the CW311, was presented in the same year. The Spyder was powered by a modified Mercedes-Benz engine generating . A new variant having an uprated 3.0-litre Inline-6 engine was introduced in 1987. The Spyder was renamed as the Spyder 033i and the Spyder 036i to indicate the difference between the offered engines and the use of electronic fuel injection in the engines (with the "i" designation). 

The CW311 would finally see production in 1984 as the Imperator 108i. The Imperator 108i was offered with a choice of Mercedes-Benz V8 engines having different displacements, ranging from 5.0-litres to 6.0-litres. The car received a facelift in 1991 which added changes in ventilation to improve cooling, some visual changes and changes to the exhaust system to pass stringent safety tests. A total of 30 Imperator 108is would be made before production ended in 1993.

In 1993, Isdera intorduced the Commendatore 112i. It had many advanced and unique features at the time such as two sets of gull-wing doors, and an automatic air brake. The Commendatore 112i could accelerate from 0 to 100 km/h in 4.0 seconds, and had a top speed of . The car had a mid-mounted Mercedes-Benz 6.0L V12 engine generating  and a 6-speed manual transmission. The car weighed . The 112i was featured in the 1997 video game Need for Speed II.

Isdera planned a limited production run of the Commendatore 112i like its predecessor and quoted that each car would take six months to complete. The car was not functional when it was introduced. The development of the car reportedly cost a total of €4,000,000. This combined with the ongoing economic recession in South Asia, particularly the bursting of Japan's bubble economy, pushed the company into bankruptcy shortly after the car's introduction as the major investments came from Japan. The company was then bought by Swiss investors under whom Schultz completed the car in order to make it driveable on the road.

In 1999, the Commendatore 112i was updated and renamed to "Silver Arrow C112i" by the new management. On the exterior, the updated car had conventional side-view mirrors and had silver five-spoke Mercedes-Benz alloy wheels instead of the gold BBS units. The engine was a 6.9-litre Mercedes-Benz M120 V12 unit, which generated a total of . Interestingly, there was no Isdera badging on the car and it had Mercedes-Benz badging instead. The Silver Arrow C112i was unveiled at the 1999 Frankfurt Motor Show.

The Silver Arrow was bought by a Swiss businessman Albert Klöti at a price of €1,500,000 in 2000. Albert kept the car for 5 years after offering it on eBay for sale in October 2005 for US$3,000,000. The car failed to sell at the auction.

In 2006, Eberhard Schulz introduced the Autobahnkurier AK116i as a private project, a retro-styled vehicle based on the Mercedes-Benz W126 S-Class and powered by two Mercedes-Benz V8 engines – one for each axle – from the W126 series 500 SE. The resulting power plant is a 10-litre unit rated at  and  of torque. The top speed was limit to  due to excessive fuel consumption of the massive engine over speeds of . The design which resembled a touring car from the 1930s, was inspired from the Bugatti Royale and the one-off 1936 Mercedes-Benz 540K Autobahn Kurier. The car featured a full leather interior with creature-comforts and a marble dashboard.

In 2016, the Silver Arrow C112i from Albert Klöti was bought back to Germany in was restored back to its original form and made appearances at selected cae shows. Subsequently, on 13 February 2021, the Isdera Commendatore 112i was sold at auction at Sotheby's France in Paris for .

In 2017, Isdera entered into a partnership with Chinese electric vehicle startup WM Motor to design and produce electric cars. In 2018 the Isdera Commendatore GT was developed to support the marketing activities of WM Motors for the EX5 Pro which was designed by Isdera and co-branded Isdera. Both cars were unveiled together at the Auto China 2018. Like preceding Isdera automobiles, the GT also employs gull-wing doors. The co-branded Isdera EX5 Pro was produced in a small batch of only a few hundred cars and sold at the Chinese market. In 2020 the cooperation with WM Motor ended.

In 2021, the ISDERA brand was acquired totally by Chinese capital Xinghui Automotive Group with the official Chinese name: 鹰兹, the new ISDERA brand is looking to carry on the legacy of high-level craftsmanship of hand-build sports car as the founder Eberhard Shulz always insisted, only with modern design and technology to enhance the legacy even more. 

In 2024, ISDERA had set up a new R&D center in TaiCang, China,as well a new construction center in Anhui, China

Models 
 1969: Isdera Erator GTE
 1982: Isdera Spyder 036i
 1984: Isdera Imperator 108i
 1993: Isdera Commendatore 112i
 2006: Isdera Autobahnkurier AK116
2018: Isdera Commendatore GT

See also 
 Lotec

References

External links 

 
 Automobile-catalog.com: All Isdera cars specifications and performance data 
 RitzSite.nl: Company history of Isdera
 1999 Isdera Silver Arrow C112i

1982 establishments in West Germany
Vehicle manufacturing companies established in 1982
Car manufacturers of Germany
Companies based in Saarland
Sports car manufacturers
Automobiles with gull-wing doors