W203:
The C-Class W203 was refreshed in early 2004. In North America, the refresh took effect for the 2005 model year. The interior styling was changed in all three body styles. The instrument cluster was revised to display a set of analogue gauges, and the center console and audio systems were revised. A fully integrated iPod connection kit was available as was a better Bluetooth phone system made optional. For the North American market C 230, the "sport" package was made standard which included AMG edition bumpers, side skirts, and a rear spoiler.
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Interior
Several all-new M272 and OM642 V6 engines were introduced later in the year. In North America, the changes took effect for the 2006 model year. The C 230, C 280, C 350 replaced the C 240 and C 320, the new-generation six-cylinder engines developed substantially more power than the older versions, by as much as 24 percent, whilst also increasing fuel economy and reducing CO2 emissions. The C 230, C 280 and C 350 developed 150 kW (204 PS), 170 kW (231 PS) and 200 kW (272 PS) respectively. The three-valve twin spark design was replaced by a four-valve design, now with variable valve timing. On the diesel side, Mercedes-Benz released a brand-new 3.0-litre V6. Fitted to the C 320 CDI, the new diesel cut CO2 emissions and fuel consumption over the old C 270 CDI, and increased outputs to 165 kW (224 PS) and its torque of 510 N·m (380 lb·ft) made it the worlds most powerful diesel at the time. The C 220 CDI received a power increase from 105 to 110 kW (143 to 150 PS). In addition, these engines also received the new seven-speed 7G-Tronic automatic transmission.
W211:
The W211 was updated in 2006 for the 2007 model year, to address quality and technical issues raised by earlier models.[21] There was new standard and optional equipment, which enabled the W211 to hold its own against its competitors. Sensotronic was dropped due to customer complaints about its software, while Pre-Safe (w/o autonomous braking) was made standard. The announced vehicle was unveiled in 2006 New York International Auto Show.[22] In total, 29 model variants were available, with 16 Saloons and 13 Estates. New standard equipment included PRE-SAFE active protection, NECK-PRO head restraints, flashing brake lights, tyre pressure monitor. The optional Intelligent Light System included bi-xenon headlamps and 5 different lighting functions. The bodies were restyled including rear door mirror, redesigned headlamps, front spoiler, rear lights and steering wheel.[23]
Coinciding with the minor model update, the largest factory built engine in the E-class range, the E500 (badged E550 in some countries), had its engine size increased from 5 litres to 5.5 litres in 2006. There is also an AMG model badged E63 AMG and other tuning house installations.
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