Honest John: will Mercedes software update to clean up emissions affect performance and economy?
Our consumer champion advises on recall-based updates for diesel-engined cars. Plus: pursuing a claim for screen damage due to a stone chip
15 January 2021 • 10:00am
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Opportunity NOx
Mercedes has offered my son a free software upgrade to reduce the emissions of oxides of nitrogen of his C220 CDI Avantgarde, which was first registered in July 2009. Should he expect any adverse effects on the car’s performance or fuel consumption, as I believe happened to some similarly recalibrated VW Group cars after the initial emissions scandal? Have you heard of any other negative outcomes? GB