2010 cgi 1.8 turbo c200. I need to change my spark plugs after 84,000 km.My plugs read NGK PLKR7B8E with the benz logo.I am not sure if these plugs are laser or platinum.What is the correct plug to use, iridium or platinum? Thanks.

 

In the USA, they refer to that plug as "double platinum". I'm sure BOSCH would have an equivalent plug if you prefer that brand, Philip.