2003 Volkswagen Jetta Coil Pack reaplacement

My wife recently took her car into the shop to have a check engine light looked at. The VW service station is saying we need to replace the coil pack ($450) and thermostat ($300). I am mechanically inclined but do not want to mess with her car if it will be to complicated to do myself. Any thought on the complexity of these two items for a novice home mechanic?

Thanks.