Mar.16 (GMM) F1 cars' standard electronic units, supplied by a McLaren subsidiary, are causing problems in 2013.

As the electronic control units (ECU) were upgraded ahead of the turbo V6 debut next year, teams struck trouble during recent testing.

McLaren Electronic Systems (MES) reacted to the bugs, but in Melbourne on Saturday, the telemetry links between the cars and FIA race control failed.

It meant drivers had to revert to watching trackside flags rather than cockpit lights, while race director Charlie Whiting was unable to automatically disable the cars' DRS systems, according to Auto Motor und Sport.

Meanwhile, a Melbourne power outage caused chaos among F1's international television broadcasters in the crucial buildup to qualifying -- which ultimately was delayed due to bad weather.

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