You are probably looking around 2001 as a year.
Petrol engines run from 2.0 litres to 4.0 litres
Diesel are all based around 3.0 litres, 525 no turbos, 530 single turbo, 535 twin turbo
Top specs are either SE trim, or higher spec M Sport. Cruise control is standard but heated leather, memory seats, auto dim mirrors etc are extras but generally bought.
Worth buying a car with Xenon headlights, very much better than standard lights.