V10 diesel Touareg to return by 2006

Volkswagen of America vows to return the diesel powered V10 Touareg to the US market by MY2006. They dropped the model for the MY2005 after VW could not certify that it would meet federal emission standards. In order to return the V10, however, VW will have to persuade the EPA. VW proposes to use an additive called ferrocene into the V10's tail exhaust to improve the performance of the particulate filter. The problem is that ferrocene is not approved for use in the US. But, VW is determined to find an alternative and keep their 2006 promise. VW wanted to use ferrocene as an interim solution until low sulphur diesel is more readily available in the US.

Article: AutoWeek