Mercedes have "voluntarily" removed their controversial suspension system for the Australian Grand Prix.
It follows Saturday's news that, following complaints about the active suspension-mimicking technology from Ferrari, the FIA told Red Bull to take off a similar system.
Auto Motor und Sport says that while Mercedes's version is technically legal, the team "doesn't want to take any risks in the first race".
Mercedes's decision is also "because the system has no advantage in Melbourne", the report adds.
Another theory is that the technology is so complex, and so close to the borders of the regulations, that there is a risk the stewards may ultimately declare it illegal after the race has been run and won in Australia.
An FIA source said: "If we had the slightest doubt, we would have to communicate these doubts to the stewards. What do you think they would decide?"
The season-opening race in Melbourne gets underway at 6am BST tomorrow with Lewis Hamilton in pole position.
