Date registered: May 2005
Vehicle: '07 GL320CDI
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Mercedes publishes a list of oils it has approved for its various vehicles.
You're clearly not from USA so best advice I have is to ask a Mercedes dealer or post at a forum in your country.
It is very true that vehicles with diesel particulate filter require matching motor oil, and the specification we use is Mercedes 229.51 (not interchangeable with 229.5)