The MERCEDES-BENZ S CLASS (1999-06) S55 AMG 4DR SALOON 5.5 AUTO is a large luxury saloon with a 5.5-litre petrol engine and automatic gearbox. In the UK, it sits among prestigious executive cars, pairing S-Class comfort with AMG performance. It rivals the BMW 7 Series and Audi A8, while its AMG badge gives this version a distinctive enthusiast following. Mycarcheck.com records 166 look-ups across 23 VINs, a useful snapshot but not a huge sample. Average mileage is 117,000 miles and annual use around 4,000 miles. The average private-sale valuation is £1,400, while recorded cars average about five and a half previous keepers, so individual condition and service history matter. This S55 AMG is best for enthusiasts or buyers wanting a comfortable car for journeys, not new drivers or budget-minded commuters. Its spacious cabin, imposing presence and effortless automatic drive suit business travel and occasions. Strong performance sets it apart, but age and running costs make a history and condition check essential.