Whitmarsh said: "McLaren support the idea of Kers in F1 and we'd love to have it.
"What we have to do is look at the bigger picture as F1 has to be sustainable for a minimum of 10 teams and if we are to reintroduce Kers we have to decide the speed which we reintroduce it and make sure it's affordable.
"Last year was interesting because some teams had Kers and others didn't - maybe in the future Kers should be one of those sporting opportunities i.e. have a number of Kers deployments (per lap) that help overtaking.
Mercedes team principal Ross Brawn said the decision was complicated by the planned introduction of new types of engines in 2013 to replace the current normally aspirated 2.4-litre V8s.
"We acknowledge that Kers will have a part to play in future technologies," Brawn said.
"We think the (power) gains available last year were not significant enough and that we should look at Kers in the future with that in mind.
"We would prefer to look at something that is planned and integrated with the new power-train in 2013.
"That doesn't mean to say that Kers can only come in 2013 - maybe it can be anticipated (brought forward) - but if we do a system now and another in 2013 it's a shame.
"The systems we have now, the advantage they offer is probably not enough and we need to look at systems that are substantial enough to help the sporting side of racing.
"If we had a push-to-pass button that you could only use a certain amount of times then we would have something quite exciting.
"So I think Kers has a future but we have to be careful not to rush back to what we had last year which we all agreed was not perhaps a huge success."
Renault team principal Eric Boullier said his team were pushing for a return of Kers.
He told Autosport: "Renault is aiming to have Kers back in 2011 because for us there are many interests in having this.
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