Belgium Friday quotes: Mercedes

Nico Rosberg, 13th & 13th: It's been a difficult day for us as we have been trying to get our revised parts for the car to work. The weather conditions have complicated our programme and whilst we've tried a lot of different things, it's been tough to get any consistent feedback. I've suffered with understeer all day and really struggled with the balance on the wet tyres. The inters were better and it's difficult to say for the slicks really. I was quite far off with my car balance with the dry tyres so that didn't help. So a tricky start to the weekend for us and we need to sit down overnight and try to solve the problems.

Ross Brawn: It was a very challenging day but then these types of changeable conditions may provide the opportunities that we can take advantage of this weekend. Nico's day was hindered by a few car issues which will be resolved by tomorrow whilst Michael was slightly happier with his progress.

Norbert Haug: A difficult first day for everybody with changing weather conditions which we all are familiar with at Spa and which seem to belong to this circuit like Eau Rouge and La Source. It seems that our upgrades can improve the car but we need tomorrow's practice session to get more running with the parts. The weather forecast is predicting rain which doesn't help when our target is to put new parts on the cars. However even in these tricky conditions we can continue to learn and make progress.