I have read many threads discussing the options for extended warranty on the smart. I am less than a week away from making the decision. The problem i have is that I have no idea what it costs to fix a car like this as i have driven MB for the last 20 years. If i need a out of warranty repair at the benz dealer, it is bend over time. set of spark plug wires (dealer item) were $350 last week, along with a mass airflow sensor (another $390) and plugs and labor, I am over 1500. Will these cars have crazy expensive parts like this and a computer that typically only the delaers can read? Has there been a consensus about which company offers the best extended warranty for the price and level of service? THANK YOU FOR YOUR INPUT