My dealer gave me a detailed run through of how the DPF works on my 110 I picked up on the weekend. He said if the DPF warning light came on, go for a 30-45 minute drive at 110km/h until the contents ignite and eject from the exhaust.
I can't imagine why he'd go through all of that if the car didn't have one. I'll have to check under the bonnet myself I guess.

