The radiator is a fairly difficult task for the individual to do at home because of the risk of transmission leaks or coolant leaks. These leaks can cause severe engine or transmission damage. The headlight rims are not very difficult to replace yourself and are readily available through aftermarket suppliers. Just take your time and don't "force" any of the plastic - it is known to break. A sidenote, we are going to try to add a parts section to mercedesshop for people just like you (let us know what you think).