2007 MERCEDES-BENZ S550 SALOON

The W221 S500 (2005-2013) used the M273 5.5-litre V8 producing 388hp. The default executive choice. Facelift cars (2009+) added further refinement.

Engine: M272 V6 - balance shaft issues (2004-2008 production). M273 V8 - similar concerns early cars. M156 - head bolt recall essential. M157 twin-turbo - more reliable. OM642 diesel - injector seals, timing chain. AIRMATIC: Standard - still expensive but improved over W220. ABC: On AMG/V12 - budget £5k+ for overhaul. Electrics: Complex - various modules fail. COMAND screen. Pre-safe system. General: Much improved over W220 but still complex. Facelift (2009+) preferred.

Facelift (2009+), V8 or V12 engine, Long wheelbase, Distronic Plus, Night Vision, Rear entertainment, Designo leather, AIRMATIC/ABC working, Full dealer history