Wool and Bovington Motors Group will open an MG outlet in North Street, Wareham, tomorrow.
To be known as Purbeck MG, it will be the newest part of the Wool and Bovington Motors Group, which was first established in 1950 by Major William Pyne and his son Robert.
The group is now run by the current directors Nick and Tim Pyne, grandsons of the founder.
Purbeck MG, which will be the only MG dealer in Dorset, will look to attract business from Poole, Bournemouth and the Purbeck district.
The site is being given a complete overhaul for MG and one additional member of staff has been taken on to help cope with the anticipated new business.
It is the 12th new MG dealer appointment this year.