The Mercedes-Benz E-Class (W211 for the sedan, S211 for the estate) is an iconic executive car that marked a major technological and stylistic leap compared to the W210. However, its history is split into two distinct eras. Phase 1 (2002-2006) was marred by major electronic reliability issues, notably the infamous SBC (Sensotronic Brake Control) braking system. Phase 2 (Facelift, mid-2006-2009) corrected almost all of these flaws (abandonment of SBC for conventional hydraulic braking, improved manufacturing quality), transforming the W211 into one of the most reliable executive cars of its time. In terms of petrol engines, the transition between the robust but older M112/M113 blocks and the new M272/M273 also brought its share of challenges (balance shaft sprockets).
The Mercedes E-Class W211 is a car with two faces. Phase 1 models (2002-2006) should be approached with extreme caution due to the SBC system and early electronic issues. In contrast, a Phase 2 (2006-2009) is one of the best modern Mercedes ever built. For a petrol purchase, the safest and most economical choice is an E 240 or E 320 (Phase 1, if the SBC has been changed and radiator checked) or, ideally, an E 350 Phase 2 from late 2008 or 2009 (with the M272 engine made reliable). V8 enthusiasts will turn to the indestructible E 500 (M113 engine, 2002-2006) or the legendary E 55 AMG, keeping a substantial budget for peripheral maintenance (Airmatic).