He'll pop in at Enstone HQ on Wednesday to check-up on wind tunnel progress with the unlaunched R25 car.
French-owned Renault finished third - behind BAR-Honda (second) and Ferrari - in the '04 constructors' world championship.
"I haven't seen the R25 yet," Franck said in an interview, "but I can't wait."
Montagny, who attended every grand prix in 2004 and tested in Europe in-between, holidayed in Morocco after the Brazilian Grand Prix, before completing 12 days at the pre-Christmas Spanish tests. -GMM