Reuters - Mon, 26 Apr 12:37:00 2010
"It's not a new chassis per se, it's a chassis we used in testing," team principal Ross Brawn told Reuters.
"The one he had (before) got damaged during the first few races and we repaired it as best we could at the races. But now we are back at base we are going to re-introduce the test chassis and he will be using that in Barcelona."
Brawn said the wheelbase would also be changed to improve weight distribution, and Mercedes are also planning a major aerodynamic revamp for the first race of the European season after four in the Middle and Far East.
Schumacher, a winner at Benetton and Ferrari with Brawn as technical director, is making his Formula One comeback at the age of 41 and after retiring at the end of 2006 with a record 91 race wins.
The German has been outqualified and beaten in all four races to date by team-mate and compatriot Nico Rosberg, with concern mounting that Schumacher is finding it hard to replicate his form of old.
Schumacher finished 10th in the latest race in China while Rosberg was third after leading early on.