I recently (about a week ago) had a new engine put in my 2001 A4 at the dealer's cost due to the infamous oil sluge problem. Now my CEL is flashing and car is sputtering. Based on other forum posts it sounds like my coil pack needs to be replaced, right? And if so, should this be something that the dealership pays for, since they just put a brand new engine in? Would the coil packs have been part of the new engine? Thanks in advance for your help.