Sprinter 2002-Mid 2006 (All 2002, 2003, 2004, 2005 and early 2006 engines)
If you have a 2006 engine:
To determine which woodruff key you need, examine the head of the crankshaft bolt.
It it is marked 10.9, then choose this key,
If it is marked 1150, then see the key shown below.