Williams have downplayed concerns that being an engine customer and not a works team could hurt their chances this season.
This year with the new engine regulations there have been some suggestions that works teams such as Mercedes and Ferrari will have the advantage.
This appeared to be true in the opening pre-season test where Mercedes and Ferrari were able to cover the most miles with the least problems.
However, Williams, who swapped Renault power for Mercedes ahead of the new 1.6-litre V6 era, are confident in their relationship with their new engine supplier.
"We're very happy with the relationship we have with Mercedes," Williams chief test and support engineer Rod Nelson...
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