Nick Heidfeld has already been confirmed to be carried out by Renault R31 instead of Robert Kubica injured this season, according to a German report.
Team Lotus Renault GP as it has announced that the age of 33, Heidfeld, German will test in Jerez this weekend R31, but only as "a potential replacement" car number 9.
But the German newspaper Bild-Zeitung says veteran Heidfeld also will participate in March and beyond.
The newspaper said he has already had the adjustment in the seat of the single-seater R31 in Enstone.
A Renault source told Bild: "(Vitaly) Petrov is relatively inexperienced." For exhaust the full potential of the car, definitely needs a strong and experienced man... “
"And the team has already been talking with Heidfeld in recent years," said the source.
In fact, Heidfeld has been a contender for the post in career alongside Kubica this year, when Renault was considering not to renew contract of Petrov career.
But for the moment, Renault is not confirming the news.
A spokesman told the DPA news agency that would be "inappropriate" decision, "While Kubica is still in intensive care".
And remains part of the rumor Tonio Liuzzi could be summoned to an evaluation for the Barcelona test.
"We must wait tests of Jerez and luckily now also for the Barcelona", confirmed the owner of the team, Gerard Lopez.
Referring to Heidfeld in particular, added: "All know that Nick is quite good, but do not know what level has now, don't know how will do it with our car".
"The same is true with Vitantonio Liuzzi, is the same - I don't know - with Bruno Senna, who last year was on a computer running a car could do nothing", said Lopez.
Nico Hulkenberg manager Willi Weber, however, is convinced: "Nick Heidfeld is going to the race", is quoted by Auto Motor und Sport.
