do you have a potential buyer already?
otherwise if not I say just keep having your own car until you at least get Deb running once Deb is reliable enough to use daily then sell Benz.
Deb doesnt have to be all the way finished just drivable then you can keep improving things with extra money from Benz
'03 VW Jetta TDI
'02 Chevy Corvette Z06
'99 Triumph Daytona