Ubermacht

Übermacht, a parody of BMW, is an automotive company in GTA IV that produces vehicles such as:
 * Oracle
 * Rebla
 * Sentinel

These vehicles are based off of the BMW 7 series, X5, and the 3 series, respectively.

Übermacht's logo parodies BMW's, in that it is square instead of round and appears to depict teeth instead of an aircraft propeller. Übermacht means "superior" in German.