Opel is fighting back against allegations that the Zafira doesn't comply with emissions standards.

Following claims from the German Environmental Relief (DUH) origination that the Opel Zafira 1.6 CDTi emitted excessively high nitrogen oxide (NOx) levels, the company took the unusual step of putting a Zafira 1.6 CDTi on both a two-roller and a four-roller test bench to confirm the emissions comply with the legal limits.

The results showed the model was compliant and Opel pointed out moving the rear wheels has no effect on the emission systems.  The company went on to call the DUH's allegations "clearly false and unfounded."

A short while later, Opel pulled out all the stops and performed a test of a Zafira 1.6 CDTi on a four-roller test bench in the presence of TÜV Hessen.  Those results also showed the model complied with emission regulations and a full TÜV report documenting this will be released shortly.  Opel also took the opportunity to once again say they don't use defeat devices and allegations indicating otherwise are false and unfounded.

Gallery: Opel fights back against alleged emissions cheating

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