I loved the Oldsmobile Calais. Velour interior made you feel like you're in the lap of luxury but at an affordable price. All around a great car. But N-Class so, yup, died of head gasket failure.
Had a gf who had a Buick Skylark. Another decent 4-door. When hers died (head gasket), I ended up looking it up and discover the entire GM N-Class line were defective that way.