Kevin Magnussen put McLaren at the top of the timesheets while reigning champion Red Bull suffered a torrid four days in Formula 1's opening pre-season test of 2014 at Jerez.
Acclimatising to the most sweeping rule changes in the sport's recent history - in particular the new V6 turbocharged engines - largely dictated the tempo in Spain this week.
Red Bull suffered most, clocking up just 21 laps across the week as overheating issues, coupled with wider power unit dramas for Renault, blighted its early preparations.
|Jerez test reports|
|Tues: Raikkonen starts off quickest|
|Weds: Button leads, Renault in trouble|
|Thurs: McLaren rookie Magnussen fastest|
|Fri: Massa and Williams end week on top|
Mercedes in contrast looked ominously strong as both a constructor and an engine supplier.
Teams using Mercedes power clocked up 875 laps in total - compared to 151 for Renault - while Nico Rosberg and Lewis Hamilton managed a combined 309 laps.
Ferrari too ran well, with Kimi Raikkonen topping the opening day of the test and Fernando Alonso second only to Rosberg in the mileage chart.
While that figure was ultimately the most important barometer for teams given the sheer number of new processes to learn and assimilate, McLaren still had the honour of setting the early season pace courtesy of its new rookie recruit.
Magnussen hit the front on his first official day as a grand prix driver, and with day four affected by poor weather his 1m23.276s was enough to seal top spot by just under half a second.
Felipe Massa was his nearest challenger, as a strong start to life with Williams left him second overall and top in the slippery conditions of the final day.
|AUTOSPORT columns from Jerez|
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|F1 2014's plot thickens|
|Alarm bells ringing at Red Bull|
|Mercedes wins the phony war|
|Drivers' view of F1 2014|
|Trackside verdict: Mercedes rises early|
Hamilton, Jenson Button and Valtteri Bottas emphasised Mercedes' emphatic start by all sealing top-six spots, with Raikkonen (fifth) and Alonso (seventh) the only non-Mercedes-powered drivers in the top 10.
The latter, along with several others, moved on to attempting much longer runs in the final afternoon, only for their stints to be scuppered by a trio of red flags - the latter two for Magnussen, who ended his test in the Turn 10 barriers.
That meant Rosberg was the first and only man to do a full race simulation, putting the seal on the German manufacturer's resounding opening to F1's new era.
Pos Driver Team Time Gap Day 1. Kevin Magnussen McLaren-Mercedes 1m23.276s Thurs 2. Felipe Massa Williams-Mercedes 1m23.700s +0.424s Thurs 3. Lewis Hamilton Mercedes 1m23.952s +0.676s Thurs 4. Jenson Button McLaren-Mercedes 1m24.165s +0.889s Weds 5. Kimi Raikkonen Ferrari 1m24.812s +1.536s Weds 6. Valtteri Bottas Williams-Mercedes 1m25.344s +2.068s Weds 7. Fernando Alonso Ferrari 1m25.495s +2.219s Thurs 8. Nico Rosberg Mercedes 1m25.588s +2.312s Weds 9. Nico Hulkenberg Force India-Mercedes 1m26.096s +2.820s Thurs 10. Sergio Perez Force India-Mercedes 1m28.376s +5.100s Weds 11. Daniel Juncadella Force India-Mercedes 1m29.457s +6.181s Fri 12. Jean-Eric Vergne Toro Rosso-Renault 1m29.915s +6.639s Thurs 13. Adrian Sutil Sauber-Ferrari 1m30.161s +6.885s Thurs 14. Jules Bianchi Marussia-Ferrari 1m32.222s +8.946s Fri 15. Esteban Gutierrez Sauber-Ferrari 1m33.270s +9.994s Weds 16. Marcus Ericsson Caterham-Renault 1m37.795s +14.519s Weds 17. Sebastian Vettel Red Bull-Renault 1m38.820s +15.544s Weds 18. Kamui Kobayashi Caterham-Renault 1m43.193s +19.917s Fri 19. Daniil Kvyat Toro Rosso-Renault 1m44.016s +20.740s Fri 20. Daniel Ricciardo Red Bull-Renault 1m45.374s +22.098s Fri 21. Robin Frijns Caterham-Renault No time Thurs 22. Max Chilton Marussia-Ferrari No time Thurs Distance by driver Driver Team Laps Kms 1. Nico Rosberg Mercedes 188 832 2. Fernando Alonso Ferrari 173 766 3. Kevin Magnussen McLaren-Mercedes 162 717 4. Felipe Massa Williams-Mercedes 133 588 5. Lewis Hamilton Mercedes 121 535 6. Adrian Sutil Sauber-Ferrari 103 456 7. Jenson Button McLaren-Mercedes 83 367 8. Daniel Juncadella Force India-Mercedes 81 358 9. Kimi Raikkonen Ferrari 78 345 10. Esteban Gutierrez Sauber-Ferrari 60 265 11. Kamui Kobayashi Caterham-Renault 54 239 12. Sergio Perez Force India-Mercedes 48 212 13. Jean-Eric Vergne Toro Rosso-Renault 45 199 14. Valtteri Bottas Williams-Mercedes 42 185 15. Jules Bianchi Marussia-Ferrari 25 110 16. Nico Hulkenberg Force India-Mercedes 17 75 17. Marcus Ericsson Caterham-Renault 12 53 18. Sebastian Vettel Red Bull-Renault 11 48 19. Robin Frijns Caterham-Renault 10 44 20. Daniel Ricciardo Red Bull-Renault 10 44 21. Daniil Kvyat Toro Rosso-Renault 9 39 22. Max Chilton Marussia-Ferrari 5 22 Distance by team 1. Team Laps Kms 2. Mercedes 309 1368 3. Ferrari 251 1111 4. McLaren 245 1084 5. Williams 175 774 6. Sauber 163 721 7. Force India 146 646 8. Caterham 76 336 9. Toro Rosso 54 239 10. Marussia 30 132 11. Red Bull 21 92 Distance by engine manufacturer Engine Laps Kms 1. Mercedes 875 3874 2. Ferrari 444 1966 3. Renault 151 668