Hi, I am a new member and new owner of a W202 C230 1997 which has become my pride and joy. I bought the vehicle with 110,000 miles. It now has 120,000 and runs like a dream. It is time for it's first servicing but I have a few questions before I get stuck in. I hoped someone would be able to help. Which is the best complete workshop guide; Non resistor type spark plugs which are the best. I buy from this sites link Euro Car Parts | The UK's Number 1 Provider of Car Parts Online and In Store. I would like the denso iridium but after much reading I think they will be problematic. Has anyone fitted the IK16 or IQ 20;problems? It seems that after reading many posts that the Bosch F8DC4 are the way to go? does anyone with a w202 c230 used the spark plugs recommended for this car via eurocarparts site as I would like to buy from them preferably to keep my order all in one place. The offer for members of this site is pretty bloody good as well.