"She's a great friend of New Zealand and if we have any questions of her I'll just ask her. I think that would be the fastest way of resolving any issue. So there's nothing to fear."
But any real embarrassment was saved courtesy of a bit of diplomacy by a 6-week-old kiwi Dr Merkel released on Motutapu.
Mr Key had barely been able to get a smile out of the Chancellor when they first met for a wreath laying at the Auckland War Memorial Museum.
But within seconds of being confronted with the small kiwi bundle, the Germanic reserve crumbled. She coo-ed at it as she patted away, despite a bit of beak thrashing by the bird, clearly cranky at having its beauty sleep disturbed.
At a press conference afterwards, she gave her critique with enthusiasm and a big grin, describing the texture of the feathers as similar to fur. "Very smooth fur - very soft, very pleasant. It was a very pleasant experience.
"I was told this long beak does not lead to him actually nipping you, it simply shows he's a bit nervous."
More-serious weapons will be on the agenda when the leaders get to Australia for the G20 summit today.
The main summit will address economic issues and attempts to ensure the global economy is more resilient. But on the sidelines, talk will revolve around Islamic State and the Russia-Ukraine problem.
Russian President Vladimir Putin will also be there and has caused controversy by sending Russian warships towards Australian waters in an apparent show of strength.