Also from next April, DaimlerChrysler Fleet Management will be renamed Daimler Fleet Management UK and DaimlerChrysler Insurance Services will become Daimler Insurance Services UK.
The Chrysler Group has also made operational changes.
The business will rebrand as Chrysler UK and will take over head-office operations for Chrysler, Jeep and Dodge.
The companies will continue to operate from their current sites and all UK staff will continue to be employed by the new or renamed companies.
Wilfried Steffen, president and CEO of Mercedes-Benz UK, said: "Mercedes-Benz and Chrysler each have strong teams and brands that are already well established in the UK and they will continue to work with and alongside each other to strengthen further their respective businesses in this market."