Do not bother with the dealership. You can get the wires from autohausaz at a fraction of the cost. After the coil switch and new plugs, I am sure that your misfire problem will be solved. If you have not changed your airfilter recently, you should and also spray down the MAF with CRC Mass Air Flow Sensor Cleaner.
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Mike
1990 Mercedes Benz 300 SEL
2001 Mercedes Benz ML320
1999 Mercedes Benz SLK230
1986 Porsche 911 Carrera
I've done some research within this forum on plugs/wires set brands and I've narrowed it down. In short, it seems buying directly from the dealer is the BEST option when it comes to OEM/reliable parts, however, I'm trying to avoid the high costs of $9.50 per plug and $35 per wire (approx total $540).
As far as plugs go, NGK and Bosch +2 and +4 plugs have all been suggested the most. I'm going go with Bosch +4 unless someone tell's me that the +4 is just a waste of money??? For the wires, I've read that Bremi or Beru (approx $170) SHOULD be used if I'm not going to buy OEM. A few others recommended AutohausAZ which the only wires I see available online are Karlyn/STI (approx $133) which is a very nice price, but I'm nervous about the low price.
Any suggestions would be much appreciated because I would like to purchase them today. Thanks all.