2005 ml350 is there a relay for the 02 sensor heaters? if so where can i find it on 2005 Mercedes-Benz ML350

i had the car to a shop they said it needed 02 sensors replaced all4 did nothing code still says 02 heaters cant go on letting this guy replace parts at my cost thank you jim

by in Medford, NY on January 17, 2013
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