Maximum Performance & Reliability NGK SILZKFR8G7S Iridium spark plugs Compatible with : Mercedes 4 cyl. 2.0L turbo V6 3.0L turbo V6 3.5L N/A (2012-2020) Ideal for standard and sporty use Thread length : 26.5 mm Thread type : M12x1.25 Socket size : 14 mm Sold individually adjust to desired amount in the cart