b180 cdi timing belt or chain?

[brodev]

I have recently purchased a 2011 B180 CDI sport which I believe is a W245. Does it have a timing chain or belt and either way when does it need changing, if at all? TIA

 

[AMGeed]

The W245 has a timing chain, but not sure if it's a duplex or single chain.

Doubt it will need changing unless there is a problem with it.