# Mercedes reliability issues persist as Antonelli leads

> Live situation record from CLSTR: https://clstr.news/situations/fia-bans-mercedes-compression-trick
> Updated: 2026-07-20T06:43:32.000Z. Sources: 621. Developments: 43.

Mercedes kept its qualifying edge at Spa‑Francorchamps, with Andrea Kimi Antonelli taking pole and converting it into a win that further widened his championship lead. The race was marked by a first‑lap collision that forced George Russell to retire after contact with Lewis Hamilton, an incident linked to a severe loss of battery charge and straight‑line speed on Russell’s car.

Team principal Toto Wolff maintained that Mercedes’ power unit remains the strongest on the grid, disputing independent rankings that placed Red Bull‑Ford ahead. He acknowledged turbo‑pressure losses that reduced straight‑line performance in Spa and said the team is intensifying work on reliability and performance ahead of the second half of the season.

Heading into the Hungarian Grand Prix, Antonelli entered the weekend as championship leader with 204 points, 50 ahead of teammate George Russell and 45 ahead of Ferrari’s Lewis Hamilton, who served a five‑second penalty after Spa contact. Mercedes identified the energy‑management fault that forced Russell’s retirement in Belgium and said a fix is underway. McLaren announced a new aerodynamic package for its MCL40, while Aston Martin will debut a revised “B‑spec” chassis at the Hungaroring.

After the race, Antonelli finished third, raising his tally to 219 points and preserving a 50‑point cushion over Hamilton, who fell to fifth after a pit‑lane speeding penalty. Lando Norris won for McLaren, Max Verstappen was second and Oscar Piastri retired with a gearbox failure. Russell recovered to seventh. The constructors’ standings now show Mercedes ahead with 358 points, followed by Ferrari (285) and McLaren (195).

## Timeline

### 2026-07-20: Mercedes claims its power unit remains strongest after Belgian GP

Mercedes' Wolff says its power unit is strongest despite ADUO ranking, while Ferrari's Antonelli looks to challenge the team at Hungary’s tight circuit.

2 sources. https://clstr.news/cluster/mercedes-claims-its-power-unit-remains-strongest-after-belgian-gp

### 2026-07-19: Kimi Antonelli Leads F1 Drivers' Standings Ahead of Hungarian Grand Prix

Kimi Antonelli leads the 2026 F1 championship after Belgium, ahead of George Russell and Lewis Hamilton, as teams prepare upgrades for the Hungarian Grand Prix on July 26.

133 sources. https://clstr.news/cluster/kimi-antonelli-wins-belgian-grand-prix-extends-championship-lead

### 2026-07-17: Kimi Antonelli Wins Belgian Grand Prix, Extends F1 Championship Lead

Kimi Antonelli won the Belgian GP from pole, extending his championship lead to 204 points; Russell retired after a clash with Hamilton, who took a penalty, while Verstappen and Leclerc completed the podium.

449 sources. https://clstr.news/cluster/mercedes-recovers-after-difficult-freepractice-at-belgian-grand-prix

### 2026-07-13: Mercedes faces reliability concerns ahead of Belgian Grand Prix

Mercedes leads 2026 F1 qualifying but battles reliability woes ahead of the Spa Grand Prix, where Antonelli leads the drivers' title and McLaren debuts a new Mercedes engine.

30 sources. https://clstr.news/cluster/ferraris-strong-showing-challenges-mercedes-ahead-of-spa-gp

### 2026-07-10: Audi's Mattia Binotto demands overhaul of F1 ADUO power‑unit rule

Audi's Mattia Binotto urges the FIA to revamp the ADUO system, saying it unfairly rewards strong teams like Mercedes while disadvantaging rivals such as Red Bull.

4 sources. https://clstr.news/cluster/mattia-binotto-urges-fia-to-overhaul-f1-aduo-powerunit-rule

### 2026-07-04: Red Bull challenges FIA over ADUO engine ruling

The FIA upheld a decision that Red Bull's combustion engine is the strongest, denying ADUO concessions, sparking meetings at Silverstone, surprise from Ferrari, and reports of Red Bull trying to buy out Verstappen’s contract.

2 sources. https://clstr.news/cluster/red-bull-challenges-fia-over-aduo-engine-ruling

### 2026-07-03: Ferrari-Mercedes budget‑cap clash after Wolff’s upgrade critique

Ferrari’s Frédéric Vasseur rebuked Toto Wolff’s claim that Ferrari’s upgrades breach the F1 cost cap, defending the team’s development pace amid budget‑cap tensions.

2 sources. https://clstr.news/cluster/ferrari-mercedes-budgetcap-clash-after-wolffs-upgrade-critique

### 2026-07-03: Ferrari team principal Vasseur rebuts Wolff's cost‑cap cheating allegation

Mercedes chief Toto Wolff questioned Ferrari’s upgrades under the F1 cost cap; Ferrari boss Fred Vasseur called the remarks ironic and denied cheating, while Wolff said Vasseur mis‑understood his comments.

7 sources. https://clstr.news/cluster/ferrari-chief-vasseur-rebuts-toto-wolffs-costcap-criticism

### 2026-07-03: Ferrari's aggressive F1 upgrade program sparks budget concerns from rivals

Ferrari’s rapid F1 upgrades raise budget‑cap doubts from rivals; Mercedes boss Wolff questions sustainability as Hamilton cites energy deficits.

2 sources. https://clstr.news/cluster/ferraris-aggressive-f1-upgrade-program-sparks-budget-concerns-from-rivals

### 2026-07-01: Mercedes faces pressure ahead of British Grand Prix as cost‑cap debate heats up

Mercedes’ strong showing in Austria puts pressure on the team for the British Grand Prix, while a cost‑cap debate erupts over Ferrari’s upgrades, drawing comments from drivers and officials.

2 sources. https://clstr.news/cluster/mercedes-faces-pressure-ahead-of-british-grand-prix-as-costcap-debate-heats-up

### 2026-06-30: Audi chief Mattia Binotto says Mercedes exploited F1 ADUO engine concessions

Audi boss Mattia Binotto alleges Mercedes deliberately underperformed to gain ADUO engine concessions, sparking debate over the fairness of the FIA’s upgrade system in Formula 1.

5 sources. https://clstr.news/cluster/audi-chief-mattia-binotto-says-mercedes-exploited-f1-aduo-engine-concessions

### 2026-06-30: Mercedes gains edge after Hamilton’s exit as Ferrari faces budget‑cap limits

Mercedes chief warns Ferrari may exceed the budget cap with its update spree, while former driver calls Hamilton’s move to Ferrari a blessing for Mercedes’ driver line‑up.

2 sources. https://clstr.news/cluster/mercedes-gains-edge-after-hamiltons-exit-as-ferrari-faces-budgetcap-limits

### 2026-06-29: Kimi Antonelli admits concentration lapse after Austria Grand Prix qualifying error

Kimi Antonelli blamed a concentration slip for a qualifying error in Austria, finishing third as George Russell won and trimmed his championship lead; Antonelli will attend Wimbledon to support Jannik Sinner.

7 sources. https://clstr.news/cluster/mercedes-teammates-russell-and-antonelli-battle-at-austrian-grand-prix

### 2026-06-29: Ferrari upgrades spark budget‑cap concerns in Formula 1

Ferrari’s rapid upgrades at the Austrian GP have intensified doubts over Formula 1’s budget cap, as rivals and Mercedes chief Toto Wolff question the fairness of the development race.

2 sources. https://clstr.news/cluster/ferrari-upgrades-spark-budgetcap-concerns-in-formula-1

### 2026-06-28: Mercedes celebrates Russell victory and Antonelli podium at Austrian Grand Prix

George Russell won the Austrian GP for Mercedes, with rookie Kimi Antonelli third, moving the team to third in the constructors' standings behind McLaren and Ferrari.

2 sources. https://clstr.news/cluster/mercedes-triumphs-with-russells-win-and-antonellis-podium-at-austrian-grand-prix

### 2026-06-26: Ferrari launches ADUO power‑unit upgrade at Austrian Grand Prix

Ferrari debuted its ADUO power‑unit upgrade at the Austrian GP, while Mercedes secured pole without using its own upgrade; Leclerc and Hamilton completed the top three.

4 sources. https://clstr.news/cluster/ferrari-launches-aduo-powerunit-upgrade-at-austrian-grand-prix

### 2026-06-26: Red Bull Ring FP2 dominated by Antonelli while Pérez endures second mechanical failure

Antonelli tops FP2 at the Red Bull Ring while Pérez faces a second mechanical failure, leading to a Virtual Safety Car and a fire on Bottas's car.

3 sources. https://clstr.news/cluster/red-bull-ring-fp2-dominated-by-antonelli-while-prez-endures-second-mechanical-failure

### 2026-06-26: Kimi Antonelli fastest in FP2 at Austrian Grand Prix

Kimi Antonelli topped FP2 at the Austrian Grand Prix with a 1:07.014 lap, putting Mercedes ahead in a close field before qualifying.

3 sources. https://clstr.news/cluster/kimi-antonelli-fastest-in-fp2-at-austrian-grand-prix

### 2026-06-25: Mercedes dominates Austrian GP free practice as Russell and Antonelli trade top spot

Mercedes led all three Austrian GP free‑practice sessions, with Antonelli fastest in FP1‑2 and Russell topping FP3; Ferrari, McLaren and Red Bull followed closely amid extreme heat.

110 sources. https://clstr.news/cluster/kimi-antonelli-tops-austrian-grand-prix-practice-sessions

### 2026-06-24: Kimi Antonelli tops Austrian GP practice as Mercedes lock 1‑2

Kimi Antonelli led FP1 at the Austrian GP with a 1:07.796 lap, giving Mercedes a 1‑2. Extreme heat and technical issues marked the session, and Red Bull warned that FIA’s ADUO rules may block future engine upr​

74 sources. https://clstr.news/cluster/ferrari-rolls-out-powerunit-upgrade-for-austrian-grand-prix

### 2026-06-24: Ferrari rolls out hotter engine and new turbo for Austrian Grand Prix

Ferrari will debut a hotter 110 °C engine and a redesigned turbo at the Austrian Grand Prix to narrow its power gap with Red Bull and Mercedes.

2 sources. https://clstr.news/cluster/ferrari-rolls-out-hotter-engine-and-new-turbo-for-austrian-grand-prix

### 2026-06-23: Ferrari introduces minor power‑unit upgrade for Austrian Grand Prix

Ferrari will debut a modest ADUO‑allowed power‑unit upgrade at the Austrian Grand Prix, aiming to narrow the gap to Mercedes but saying it won’t alone reshape the championship order.

24 sources. https://clstr.news/cluster/ferrari-unveils-upgraded-power-unit-at-austrian-gp

### 2026-06-19: Red Bull Racing challenges FIA engine ruling while gearing up for Austria upgrade

Red Bull seeks FIA clarification on engine‑upgrade ruling, accuses Mercedes of sandbagging, tightens staff rules after Zak Brown’s complaint, and admits its Austria upgrade won’t close the gap to Mercedes and F

10 sources. https://clstr.news/cluster/red-bull-disputes-fia-powerunit-ruling-as-ford-eyes-red-bull-drivers-for-sportscar-program

### 2026-06-18: Ferrari unveils stronger engine package for Austrian Grand Prix

Ferrari will introduce an ADUO‑approved engine and fuel upgrade at the Austrian Grand Prix, targeting about five extra horsepower to narrow a 4% power gap with Mercedes.

5 sources. https://clstr.news/cluster/ferrari-unveils-stronger-engine-package-for-austrian-grand-prix

### 2026-06-18: Audi conducts 15‑km test of 2026 Formula 1 power unit in Neuburg, fueling ADUO upgrade rumours

Audi performed a 15‑km test of its 2026 F1 engine in Neuburg; driver Bortoleto praised balance but flagged a power shortfall, sparking ADUO upgrade speculation.

4 sources. https://clstr.news/cluster/audi-conducts-15km-test-of-2026-formula-1-power-unit-in-neuburg-fueling-aduo-upgrade-rumours

### 2026-06-18: Audi test fuels ADUO speculation as Red Bull challenges FIA engine ranking

Audi’s private engine test raises ADUO hopes, while Red Bull disputes the FIA’s engine ranking that could affect development tokens for the 2026 season.

2 sources. https://clstr.news/cluster/audi-test-fuels-aduo-speculation-as-red-bull-challenges-fia-engine-ranking

### 2026-06-17: Ferrari readies power‑unit upgrades as Mercedes drops Monaco appeal

Mercedes withdrew its Monaco GP appeal, while Ferrari readies a power‑unit upgrade and Red Bull awaits FIA review as teams prepare for the Austrian Grand Prix.

2 sources. https://clstr.news/cluster/ferrari-readies-powerunit-upgrades-as-mercedes-drops-monaco-appeal

### 2026-06-16: Red Bull engine tops ADUO rankings for 2026 F1 season

James Vowles says Red Bull's engine leads the 2026 F1 ADUO rankings, ahead of Mercedes and Ferrari, while FIA explains ADUO grants development funds to slower engines.

2 sources. https://clstr.news/cluster/red-bull-engine-tops-aduo-rankings-for-2026-f1-season

### 2026-06-13: Red Bull disputes FIA ADUO engine power benchmark for 2026 F1 season

FIA’s ADUO report named Red Bull the 2026 engine power benchmark, but Red Bull disputes the assessment, fearing limited development concessions while other makers benefit.

2 sources. https://clstr.news/cluster/red-bull-disputes-fia-aduo-engine-power-benchmark-for-2026-f1-season

### 2026-06-13: FIA declares Red Bull power unit the top performer in ADUO evaluation, prompting surprise from Verstappen

FIA ranked Red Bull’s engine highest in the ADUO assessment, granting Mercedes and Honda extra upgrade slots; Verstappen voiced surprise at the outcome.

2 sources. https://clstr.news/cluster/fia-declares-red-bull-power-unit-the-top-performer-in-aduo-evaluation-prompting-surprise-from-versta

### 2026-06-13: F1 team chiefs endorse FIA ADUO engine upgrade system for 2026

F1 team bosses Toto Wolff and Mattia Binotto backed the FIA’s ADUO system, granting extra engine development to teams trailing Red Bull’s 2026 benchmark and rejecting a Balance‑of‑Performance approach.

2 sources. https://clstr.news/cluster/f1-team-chiefs-endorse-fia-aduo-engine-upgrade-system-for-2026

### 2026-06-12: FIA ADUO ruling awards development token to Red Bull, prompting Red Bull to demand data

The FIA’s ADUO review named Red Bull’s ICE the strongest, granting it a development token and sparking a Red Bull request for data, while Mercedes missed out despite early season dominance.

2 sources. https://clstr.news/cluster/fia-aduo-ruling-awards-development-token-to-red-bull-prompting-red-bull-to-demand-data

### 2026-06-12: Red Bull F1 team protests FIA ADUO engine evaluation, warns of impact through 2028

Red Bull contests the FIA’s ADUO engine evaluation, which could limit its performance advantage through 2028; the FIA says the system uses standardized torque‑sensor data to ensure fairness.

6 sources. https://clstr.news/cluster/dena-pitcher-ssuke-baba-aims-for-a-fresh-start-after-career-setbacks

### 2026-06-11: FIA ranks Red Bull engine as benchmark, gives Mercedes ADUO upgrade

FIA’s ADUO list ranks Red Bull’s engine as benchmark, denying it upgrades, while Mercedes receives development allowance, sparking controversy in Formula 1.

2 sources. https://clstr.news/cluster/fia-ranks-red-bull-engine-as-benchmark-gives-mercedes-aduo-upgrade

### 2026-06-11: FIA ranks Red Bull's engine best for 2026 season, prompting Red Bull protest

The FIA’s 2026 engine performance index named Red Bull’s ICE best, blocking its upgrades while granting Mercedes and others development slots; Red Bull has protested the ranking.

4 sources. https://clstr.news/cluster/fia-ranks-red-bulls-engine-best-for-2026-season-prompting-red-bull-protest

### 2026-06-11: Red Bull asks FIA to re‑check F1 ADUO engine power rankings

Red Bull has asked the FIA to re‑audit the ADUO engine power results that placed it ahead of Mercedes, prompting a new verification expected within ten days.

3 sources. https://clstr.news/cluster/red-bull-asks-fia-to-recheck-f1-aduo-engine-power-rankings

### 2026-06-09: FIA ADUO system under fire as power‑unit ranking delay fuels controversy

FIA’s ADUO system for F1 2026 is delayed and contested; Red Bull protests ICE‑only ranking while Ferrari, Mercedes, Audi and Honda seek extra development budgets.

2 sources. https://clstr.news/cluster/fia-aduo-system-under-fire-as-powerunit-ranking-delay-fuels-controversy

### 2026-06-09: Red Bull Ford Powertrains engine faces upgrade ban after FIA ruling

FIA rules name Red Bull‑Ford power unit the strongest engine but block upgrades, while Honda will supply Aston Martin from 2026.

3 sources. https://clstr.news/cluster/red-bull-ford-powertrains-engine-faces-upgrade-ban-after-fia-ruling

### 2026-06-08: FIA names Red Bull top F1 power unit and grants upgrades to Mercedes and rivals

The FIA rates Red Bull’s 2026 power unit as the best, puts Mercedes 2 % behind and grants both Mercedes and other rivals ADUO upgrades for 2026‑27.

2 sources. https://clstr.news/cluster/fia-names-red-bull-top-f1-power-unit-and-grants-upgrades-to-mercedes-and-rivals

### 2026-06-07: Red Bull engine becomes benchmark for F1 ADUO upgrade system

FIA named the Red Bull‑Ford unit the reference for 2026 ADUO, giving Mercedes one upgrade and Ferrari, Audi and Honda two each.

6 sources. https://clstr.news/cluster/red-bull-engine-becomes-benchmark-for-f1-aduo-upgrade-system

### 2026-06-07: FIA names Red Bull engine best, allows Mercedes and Ferrari upgrades

FIA declares Red Bull's engine the best, prohibiting its upgrades, while allowing Mercedes and Ferrari to update their power units under ADUO rules for 2026‑27.

3 sources. https://clstr.news/cluster/fia-names-red-bull-engine-best-allows-mercedes-and-ferrari-upgrades

### 2026-06-01: FIA clamps down on Mercedes' engine loophole ahead of Monaco Grand Prix

The FIA has tightened engine rules from 1 June, ending Mercedes' 18:1 compression loophole and introducing upgrades to level the F1 field starting at the Monaco GP.

2 sources. https://clstr.news/cluster/fia-clamps-down-on-mercedes-engine-loophole-ahead-of-monaco-grand-prix

### 2026-05-31: FIA's new engine‑compression test hits Mercedes as Verstappen heads to Monaco with a clean record

FIA will test engine compression at 130 °C from 1 June, targeting a Mercedes loophole, while Max Verstappen enters the Monaco Grand Prix with a clean penalty‑point record.

9 sources. https://clstr.news/cluster/max-verstappen-enters-monaco-grand-prix-with-clean-fia-penalty-record

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Cite as: Mercedes reliability issues persist as Antonelli leads. CLSTR, https://clstr.news/situations/fia-bans-mercedes-compression-trick