The Mercedes AMG F1 W10 EQ Power+ is a Formula One racing car designed and developed by Mercedes-Benz under the direction of James Allison, John Owen, Mike Elliott, Loïc Serra, Ashley Way, Emiliano Giangiulio, Jarrod Murphy, Eric Blandin and Aldo Costa, to compete during the 2019 Formula One World Championship.

[13] The Mercedes AMG F1 W10 EQ Power+ was unofficially unveiled at the Silverstone Circuit with Hamilton and Bottas completing an inaugural shakedown on 13 February 2019.

[17][18] As Mercedes's first attempt at the new 2019-20 regulations, the team ran two distinct aerodynamic packages during pre-season testing: one each with 'inboard' and 'outboard' front wing philosophy.

The latter also received significantly revised nose, bargeboards, floor, and engine cover, before being chosen as the package the team would race in the 2019 season.

The car performed well in the first five rounds of the season, where it was renowned for its newly acquired slow- and medium-speed corner strength, in contrast to its predecessor.

Often compared to Ferrari, whose car featured straight-line speed, low drag, and high-speed prowess, its victories were often attributed to the ease in working the new Pirelli tire concept with its overwhelming downforce.

The Mercedes car received its first major upgrade in Spain, where it followed up a front wing update in China with a redesign of the bargeboards "boomerang".

A major weakness was first observed and uncovered in Austria, when team members remarked on the inability of the car's deliberately tight cooling to operate optimally under high-altitude and hot temperature conditions.

It received another major upgrade in Germany, where the team revised the car's rear-facing cooling outlets, sidepod vanes, bargeboards, and a new rear wing endplate design, (among other changes).

Despite this, it was still considered the most fuel-efficient power unit in the field,[citation needed] although there were, however, some reliability concerns when the third iteration of the engine (Phase 3) experienced significant failures in the 2019 Belgian and Italian Grands Prix.

Mercedes introduced a raft of updates in Japan for the front wing, sidepod deflectors, and floor, aimed to increase efficiency against Ferrari's straight-line speed and Red Bull's overall downforce balance.

Ahead of the Australian Grand Prix, Ferrari - which shone during pre-season testing - were considered as the favourites for the first race of the season.

Hamilton clocked a new lap record of Albert Park with a 1m 20.486s and achieved his sixth consecutive pole at the circuit, and a record-equalling eighth at the Australian Grand Prix.

[21] At the next round in Bahrain, Mercedes did not top any of the timing sheets in the free practice sessions and both cars qualified on the second row behind both Ferraris, with Hamilton in third and Bottas in fourth.

[26] At the Azerbaijan Grand Prix, Ferrari set a blistering pace during the free practice sessions which Mercedes seemed unable to match.

A drop in temperatures - due to a delay of the session from Kubica's and Leclerc's crashes at the castle section - and good tows during the final run in Q3 allowed Mercedes to grab an unlikely front-row lockout, their third of the season.

Unable to find a rhythm, his second effort was riddled with several mistakes and he only managed to qualify in sixth position, behind Ricciardo and Gasly.

[38] On Sunday morning, Mercedes was faced with more unreliability issues, as the team found a hydraulic leak on Hamilton's car which they could repair in time.

Bottas finished in P4 and secured the additional point for fastest lap after having pitted for a set of soft tyres shortly before the end of the Grand Prix.

Bottas led from the front and fought off his teammate but a Safety Car intervention gifted Hamilton a free pit stop, allowing him to leapfrog the Finn.

After having only used the medium compound tyres for the majority of the race, Bottas needed a second mandatory pit stop shortly before the end.

[45] After having trailed behind Ferrari in all three practice sessions in Germany, Mercedes benefited from technical issues on Vettel's and Leclerc's cars during qualifying.

Hamilton settled into second behind Verstappen throughout the first half of the race, having overtaken and tangled with his teammate Bottas in the first complex of corners at the start.

Following the mandatory summer break, Mercedes introduced the latest iteration of their power units in accordance with Ferrari's step.

However, team orders conflicts between Vettel and Leclerc, combined with a car failure for Vettel in Russia, allowed both Mercedes to jump both Ferraris in the race, while a bad start for both Ferrari drivers in Japan cost them position to both Mercedes drivers, gifting wins to Hamilton and Bottas respectively in both rounds.

However, Verstappen was penalized with a yellow-flag infringement in qualifying after setting pole position, forcing him to start alongside Hamilton, who battled with him at the first complex of corners and damaged both cars when they ran wide into the grass.

Bottas crashed in qualifying (which brought up the aforementioned yellow flags), but was unable to take advantage of the battles ahead of him to move forward.

In contrast, Mercedes struggled in Brazil during qualifying, though Hamilton was able to jump Vettel at the start from third and ran second for much of the race behind polesitter Verstappen.

He made a forceful move against Alexander Albon for second place, crashed with him, and was shuffled back to third after failing to overtake Pierre Gasly in the Toro Rosso at the line.

Bottas retired in the middle part of the race with power unit failure, which meant neither Mercedes scored a podium since Singapore.