Thanks sgd,sgd wrote:that's because they want to change Webber's engine to a new-spec-one wothout losing 10 places in qualif.
Heidfeld had to change it anyway so that's why they did so.
(for this race NH had to use the same engine he used at imola, but Webber can use a new one)
Reading Williams statement again I see what they are doing. Must have had brain fade the first time I read it!
Heidfeld had to change an engine so they gave him the one Webber was supposed to use. They'll get two new spec engines and get them in the cars in time for the 1st free practice session tomorrow.