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 for sale online | eBay
Spark Plug for Mercedes - Bosch W7DC - Non Resistor Type
Candle w7dc 0.7 0241235755 Bosch item No. 0241235755 for car cars auto vehicle products goods spare parts accessories protection essential effective tool tools |Spark Plugs & Glow Plugs| - AliExpress