Hi all, I have a 2017 Smart 453 Gas turbo. I tried the standard spark plug socket but it wouldn't fit into the plug hole. Someone suggested I get the thin 14MM which I did but it won't fit the plugs I ordered which were Smart factory plugs LKR7B-9 and it also says on the box A 132 159 00 03. So, do I have the wrong plugs? I don't want to remove the engine plugs until I have the new plugs to replace them with. I feel fairly confident the 14MM socket I ordered WILL go into the spark plug hole but the spark plugs I ordered are either 16MM or 5/8 standard size. Thanks for any help.