Sl5.0 to 5.5 month change

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Starlight

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Your Mercedes
2003 Mercedes sl55
Still looking for an SL500 but can anyone tell me when exactly in 2006 they changed the engine specification.
 
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Craiglxviii

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970 Panamera Turbo; W221 S500L AMG Line, C215 CL500, W251 R350L AMG Line, plus several more now gone
Starlight said:
Still looking for an SL500 but can anyone tell me when exactly in 2006 they changed the engine specification.
Click to expand...
The 5.5 litre M273 was introduced on the R231 first model year. At some point in 2010 it changed to the M278 4.7 turbocharged V8.
 
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