How do I recognize DCT?

[Gugsbmw]

I am beginning the search for a 135i and am new to this model. How do I know if the transmission is DCT or a standard automatic?
I am looking at a 2011 model. Were both transmission available that year? How can I tell the difference?
Any help would be appreciated.

[NeilM]

The most obvious difference:
• The standard automatic has push to downshift, pull for upshift 'manual' paddles.
• The DCT has downshift on the left, upshift on the right, pull only.


Neil