Mercedes-Benz W215 C55 AMG ECS Assembled Spark Plug Set

Poor idle, low fuel efficiency, and engine misfire codes are all symptoms of worn spark plugs. Over the years, the electrode wears away on spark plugs, causing too large of a gap and weak spark. Additionally, excess carbon can build up and bridge the gap to negatively effect performance. Replace yours with these units to regain your power, fuel efficiency, and smooth a poor idle.