Not all of it, some of it - yes. In particular, the Blind Spot assist systems are prevalent in a few different manufacturers.

The more advanced "self-driving" systems are all Mercedes-Benz technology that is part of their high-end vehicles (and not a standard option). Remember, Mercedes-Benz holds over 80,000 patents on this stuff and more coming all the time. There's no doubt they are pioneers in vehicle safety systems including self-driving cars.

Edit: Mercedes-Benz actually omitted quite a few even more advanced "self-driving" features from their new S-Class since, even though the technology was ready, regulatory requirements and drivers themselves were not ready for pure self-driving vehicles. (Taken from an intervew with Marc Andreessen on the new technologies in the S-Class).