Review of results of emission tests by TNO on Mercedes diesel vehicles in relation to recent information on possible defeat devices
van Gijlswijk, R.N.
Upon request of the Dutch Ministry of Infrastructure and Water management, TNO has reviewed all its previously performed laboratory and on-road emission measurements on passenger cars and vans from Mercedes Benz to check for possible indications of two types of defeat devices: - one that switches off emission reduction systems after 26 km of driving, and - one that detects whether the vehicle is undergoing a type-approval test or is driving on the road on the basis of speed and acceleration patterns. From this review it is concluded that these on-road emission tests do not provide any indication of switching behaviour in the emission control software related to the driven distance after start of the trip.
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Mobility & Logistics