Germany's Auto Motor und Sport said there is an issue in terms of promised bonus money in the Finn's 2012 contract, given his unexpectedly large points tally.

"I don't know where this stuff comes from," the 2007 world champion's spokesman Riku Kuvajan was quoted by the Finnish broadcaster MTV3.

"I can't say anything about it."

Now, on Wednesday, the German magazine said other staff at the Enstone based team are waiting for their pay-cheques.

Auto Motor und Sport said the team's management is holding out for the latest installment of commercial income from the sport's owners, headed by chief executive Bernie Ecclestone.

The report said Lotus is waiting for that money to "pay the wages of 493 employees and Kimi Raikkonen".

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