New legal filings allege that Bosch asked for protection from future litigation.

Allegations against German engineering company Robert Bosch GmbH are deepening as a legal case against Volkswagen proceeds. Though it had already been made clear that Bosch was involved in developing the emissions-cheating software and devices that allow VW diesels to avoid certain emissions laws, new legal filings suggest that Bosch asked to be indemnified from any accusations of wrongdoing.

Bloomberg reports that plaintiffs suing VW in U.S. District Court have found documentation that Bosch asked the automaker for legal protection over the cheating device’s use in the U.S. market, citing a letter than Bosch sent to VW in 2008.

“Plaintiffs do not have a full record of what unfolded in response to Bosch’s June 2, 2008, letter,” the filing says. “However, it is indisputable that Bosch continued to develop and sell to Volkswagen hundreds of thousands of the defeat devices for U.S. vehicles.”

In January, Bosch tried to distance itself from the ‘dieselgate’ scandal. The company admitted it had supplied parts that VW used in the cheating diesel engines, but claimed that the automaker should take final blame for the engines’ performance.

Volkswagen Group of America, for its part, already agreed to a preliminary settlement over the VW scandal that would see the car company buying back hundreds of thousands of vehicles with 2.0-liter turbodiesel engines featuring cheat software. The automaker also plans to compensate dealers who may have lost revenue as a result of the diesel scandal.

Source: Bloomberg