They are not as much as most people anticipate, cost is usually around $23-42 in the US, sometimes as high as $60 for a 60's/70's car but the best prices are from independent Benz repair shops who buy from a local dealer parts counter at wholesale and move it on to you for a markup that is less than the dealer in most cases. This is true of most parts by the way.
Also, please update your User CP with your location, if I knew you were local for example I would set you up with the info here.
Also, please update your User CP with your location, if I knew you were local for example I would set you up with the info here.