Seat Leon 5f Spark Plug Replacement Procedure
To access all the spark plugs, I had to remove the air filter box and a part of the intake manifold, which was a bit tedious. Afterward, I just had to disconnect the plug and could unscrew the spark plug using a spark plug socket. I applied a bit of ceramic paste to each new spark plug and then reinstalled them with a torque wrench (in my case, 25Nm - check the manual if unsure)....