 With Spain being the first race in Western Europe , and a mid @-@ season test coming up after the race , many teams introduced their first major car updates for the Grand Prix . Mercedes ran a new front wing with a " more pointy " nose during first free practice . Other changes were made to the engine cover and the rear wing . McLaren made more significant changes to their MP4 @-@ 31 , most notably on the front wing , which Sky Sports commentator Ted Kravitz called the " most intricate front wing I 've ever seen " . Force India updated their VJM09 to improve airflow . According to the team , they were looking for improved driveability rather than faster lap times . Renault introduced a new chassis for Jolyon Palmer . More significantly , the French manufacturer debuted a new version of their power unit for both their works team and Red Bull at the two @-@ day test following the race . All other teams except for Sauber also made changes to their cars , with the Swiss team continuing their financial struggles . They also announced that they would be forced to miss the mid @-@ season test , being unable to field a development driver , with regulations demanding that two out of four test days be driven by young driver talents . Both Sauber and Haas were allowed to use the updated version of Ferrari 's 2016 power unit , which the works team had already used in Russia two weeks earlier . 
 With Spain being the first race in Western Europe , and a mid @-@ season test coming up after the race , many teams introduced their first major car updates for the Grand Prix . Mercedes ran a new front wing with a " more pointy " nose during first free practice . Other changes <a href='uninflect' title='1'><mark>were</mark></a> made to the engine cover and the rear wing . McLaren made more significant changes to their MP4 @-@ 31 , most notably on the front wing , which Sky Sports commentator Ted Kravitz called the " most intricate front wing I 've ever seen " . Force India updated their VJM09 to improve airflow . According to the team , they <a href='uninflect' title='2'><mark>were</mark></a> looking for improved driveability rather than faster lap times . Renault introduced a new chassis for Jolyon Palmer . More significantly , the French manufacturer debuted a new version of their power unit for both their works team and Red Bull at the two @-@ day test following the race . All other teams except for Sauber also made changes to their cars , with the Swiss team continuing their financial struggles . They also announced that they would be forced to miss the mid @-@ season test , being unable to field a development driver , with regulations demanding that two out of four test days be driven by young driver talents . Both Sauber and Haas <a href='uninflect' title='3'><mark>were</mark></a> allowed to use the updated version of Ferrari <a href='null_genetive' title='4'><mark>'s</mark></a>2016 power unit , which the works team <a href='been_done' title='5'><mark>had</mark></a> already used in Russia two weeks earlier . 
With Spain bein da first race in Western Europe , and a mid @-@ season test coming up after the race , many teams introduced their first major car updates for tdaGrand Prix . Mercedes ran a new front wing witt a " more pointy " nose during first free practice . Other changes was made to thdangine cover and the rear wing . McLaren made more significant changes to their MP4 @-@ 31 , most notably on the front wing , which Sky Sports commentator Ted Kravitz called the " most intricate front wing I 've ever seen " . Force India updated their VJM09 to improve airflow . According to the team , they was looking fir improved driveability rather than faster lap times . Renault introduced a new chassis for Jolyon Palmer . More significantly , the French manufacturer debuted a new version of their power unit for both their works team and Red Bull at thedao @-@ day test following the race . alll other teams except fir Sauber also made changes to their cars , wid the dass team continuing their financial struggles . They also announced that they would b forced to miss the mid @-@ season test , bbeinunable to field a development driver , wwitregulations demanding dat two out of four test dayz be driven by young driver talents . Both Sauber and Haas was allowed to use the udated version of Ferrari  2016 power unit , which the works team done already used in Russia two weeks earlier .