British Touring Car Championship team Laser Tools Racing will run its own independent operation to field Aiden Moffat in the 2019 competition.
The team has been part of the BTCC for five seasons, and since 2015 it has run with engineering support from fellow Mercedes-Benz A-Class team Ciceley Motorsport.
For the new season, the Laser Tools Racing will relocate to Scotland and run the car in-house.
Moffat took a win at Silverstone last season and two other podiums on his way to 16th in the overall standings. He was eighth in the Independents' Trophy competition.
"I've never felt more excited at the prospect of a new BTCC season as I do this year," said Moffat.
"On a personal level I've been concentrating on my fitness both physically and mentally and I've never been more focused and determined.
"There are also significant changes to our Mercedes-Benz A-Class, which we've been working on since the close of the 2018 season.
"We've now moved the preparation and development of the car to our new Laser Tools Racing facility.
"Yes, we've broken ties with Ciceley Motorsport, but they have been a great assistance with the transition.
"We have built an all-new facility which gives us the engineering and preparation capability together with full bodyshop and painting, which means that we can also offer customers full race car preparation and repair too."
Moffat, a three-time race winner, said the new base would give him the chance to get involved in work on the German hatchback and he was confident of a step forward in terms of results in 2019.
"For me, it's great to be involved in the nuts and bolts of the race car prep," said Moffat.
"And this year our Mercedes-Benz A-Class has been stripped down to a bare metal bodyshell, then completely rebuilt from the ground up.
"The fresh design of the new livery looks fantastic and I can't wait to see it finished.
"With the changes for 2019, I'm confident that it will offer better handling than in previous years and be a real championship contender."
Confirmed 2019 BTCC line-up so far
WSR BMW 125i M Sport - Colin Turkington, Tom Oliphant, Andrew Jordan
Team Dynamics Honda Civic Type R - Matt Neal, Dan Cammish
Motorbase Performance Ford Focus RS - Tom Chilton, Ollie Jackson
Speedworks Motorsport Toyota Corolla - Tom Ingram
Ciceley Motorsport Mercedes-Benz A-Class - Daniel Rowbottom
AmD Tuning Honda Civic Type R - Sam Tordoff, Rory Butcher
Laser Tools Racing Mercedes-Benz A-Class - Aiden Moffat
Simpson Racing Honda Civic Type R - Matt Simpson
Team Hard VW CC - Mike Bushell, Carl Boardley, Bobby Thompson, Michael Crees
Excelr8 Motorsport MG6 - Rob Smith
Trade Price Cars Audi S3 - Jake Hill