Hi I've read a lot online about how this generation of devilles had been know for a range of problems,is this true? If so is there any particular model year to avoid? I'm asking as a local car lot has an '03 and an '05 both have about 80,000 miles. I want to bring my mechanic along to look at these is there anything in particular to look out for a stay clear of when buying one of these caddys used? Thanks for your help guys.