Its crazy with the spark plugs prices that the authorised dealership gives. When compared to prices out on the market the differences are huge. The other day i ask the dealership for four spark plugs for my 2008 R56S and they quote me for €90. On the web i found Bosch spark plugs at the price of €25 for four!!!! What on earth is going on? What on earth is going on guys... im talking about Bosh iridium sparkplugs 0242135518.