Tradingpost has 0 Mercedes-Benz 420Sel cars for sale in Sydenham, NSW. As Australia's favourite way to buy and sell for over 50 years, Tradingpost is the trusted way to sell your current car, and find your next car at a great price! When looking to buy or sell a Mercedes-Benz 420Sel always be sure to check out the wide range listed on Tradingpost!