Spark plug Bosch W7DC for 520/4+520i all years of manufacturing, you need 4 for 1 car and for 525+528 up to 08/1976, you need 6 for 1 car | Wallothesch
Bosch W7DC Spark Plug :Ignition Spark Plugs
Bosch Spark Plug W7DC for sale online
Spark Plug for Mercedes - Bosch W7DC - Non Resistor Type