The final W210 diesels were 220, 270, and 320 CDIs.

4, 5, and 6 cylinder inline, respectively, all with same bore/stroke.

The W210 E320CDI has basically same engine as finally became available in USA for 2005 and 2006 W211s.

The five-cylinder is found in USA Sprinter vans, 2007 models (not here yet) will have the V6.

The new V6 is actually only 3.0 displacement, but is produced in different states of tune for E280CDI and E320CDI. (And corresponding C-class models in Europe.) That is same engine, different power ratings.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles