Mercedes Sharing Power Unit Data
McLaren team principal Andrea Stella has refuted suggestions that their engine supplier Mercedes has been withholding critical technical information regarding power unit optimization. Stella's comments directly address concerns about information flow between the two organizations during the 2026 season.

Power Unit Partnership Remains Transparent
In a statement addressing partnership dynamics within Formula 1's competitive ecosystem, McLaren team principal Andrea Stella has publicly clarified the relationship between his organization and engine supplier Mercedes. Stella explicitly rejected the notion that Mercedes has been reluctant or slow in providing technical guidance about maximizing the performance potential of their power units.
The clarification comes as an important reminder of how information transfer operates between engine manufacturers and their customer teams in modern Formula 1. As a works engine supplier, Mercedes maintains responsibility for ensuring that teams using their power units receive comprehensive technical support and data necessary for optimal performance extraction. This support structure forms a fundamental aspect of the engine supply agreement between the two organizations.
Technical Collaboration and Data Exchange
The provision of power unit information encompasses numerous technical dimensions. Engine suppliers typically share data related to hybrid system management, electrical deployment strategies, thermal characteristics, fuel flow optimization, and various other parameters that directly influence performance outcomes. Teams must understand how to properly calibrate their vehicles to extract maximum efficiency and power from these complex power units.
Mercedes, as one of Formula 1's premier engine manufacturers, has established itself as a technically sophisticated organization capable of supporting multiple customer teams across the grid. The company's commitment to customer partnerships has been a consistent feature of its approach throughout its tenure as an engine supplier. Stella's statement reinforces that this collaborative approach extends to McLaren as well.
The relationship between engine suppliers and customer teams represents a delicate balance in Formula 1. While suppliers must naturally retain certain proprietary knowledge to maintain their competitive advantage, they simultaneously bear responsibility for ensuring their customers can operate their power units effectively and safely. This balance allows customer teams to compete at the highest levels while preserving the technological distinction that comes with being a manufacturer.
Addressing Speculation
Stella's explicit denial of any information-sharing concerns serves to address speculation that may have circulated regarding McLaren's access to Mercedes technical data. In the competitive environment of Formula 1, where marginal gains often determine success or failure, questions about equitable information distribution can naturally arise. However, Stella's statement makes clear that no such disparity exists in the current arrangement.
The timing of such clarifications can be significant within the F1 calendar. Team principals frequently communicate with media to address various narrative points that emerge during a season. Stella's willingness to directly address this particular matter suggests sufficient visibility into the information-sharing process to confidently refute any concerns.
The Broader Supply Ecosystem
McLaren's partnership with Mercedes represents one of the supply relationships that defines the current Formula 1 grid structure. Multiple teams operate as customers to various engine manufacturers, creating a complex web of technical partnerships that operate alongside direct competition. These relationships require professionalism, transparency, and clear contractual frameworks that protect both parties' interests while maintaining competitive integrity.
The provision of power unit information must necessarily follow established protocols and timelines that allow teams to implement improvements and optimizations effectively. Mercedes, like other engine suppliers, must balance the demands of multiple teams while maintaining quality standards for technical support across all partnerships.
Stella's statement ultimately reinforces the stability of the McLaren-Mercedes relationship during the 2026 season. By directly addressing concerns about information accessibility, the team principal has provided clarity regarding the technical foundation upon which McLaren operates its racing program. The statement serves as a public affirmation that the partnership continues to function as intended, with Mercedes providing the necessary technical guidance and data that McLaren requires to maximize their power unit performance across the competitive Formula 1 season.
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Related Regulations
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Full Regulation Text
Article 2
Information provided by the PU Manufacturer to their customer F1 Teams
Chapter: APPENDIX C5: HOMOLOGATION AND DEVELOPMENT OF POWER UNITS, FUEL AND OIL FOR 2026-2030
In Simple Terms
Engine manufacturers must give F1 teams detailed plans and specifications of their power units in two stages: a preliminary version by August and a final version by November of the year before competition. If anything significant changes after August, the manufacturer must notify teams immediately, and if teams think the changes are unfair, they can ask the FIA to investigate within 7 days.
- Engine manufacturers must provide preliminary technical specifications and 3D models to teams by August 1st of the year before competition
- Final detailed specifications, operating parameters, and installation procedures must be submitted by November 1st
- Any significant changes after August 1st require immediate notification to customer teams and FIA approval
- Customer teams have 7 days to challenge unreasonable changes, with the FIA deciding within 14 days whether modifications are acceptable
Official FIA Text
Any PU Manufacturer intending to supply a Power Unit to an F1 Team during a Championship (year N) must: a. Declare to the FIA, before 1 August of year N-1, that they provided to their customer F1 Teams: i. An initial full external space model of the Power Unit including details and locations of all physical interfaces required by the team to install the Power Unit. ii. Preliminary estimates of important operating parameters such as heat rejection, fuel mass and density, clutch shaft stiffness and engine stiffness. b. Declare to the FIA, before 1 November of year N-1, that they provided to their customer F1 Teams: i. A final full external space model of the Power Unit including details and locations of all physical interfaces required by the team to install the Power Unit. ii. Firm predictions of important operating parameters such as heat rejection, fuel mass and density, clutch shaft stiffness and engine stiffness. iii. Initial details of any other parts, procedures, operating conditions and limits or any other information required by the team to install and operate the Power Unit as intended. After the 1 August of year N-1, any significant change compared to previous communication, must be notified to the customer F1 Teams in due time. Should a Customer Team consider that the change has an unreasonable impact on the Power Unit installation in the car, they may contact the FIA within 7 days of the notification. The FIA will then contact the relevant PU Manufacturer and its customer F1 Teams in order to conduct its investigation. If the FIA is satisfied, in its absolute discretion, that these changes are acceptable, the FIA will confirm to the PU Manufacturer and the customer F1 Teams within 14 days that they may be carried out.
Article C18.2.3
LPUC Information Transfer Prohibition
Chapter: C18
In Simple Terms
Power unit manufacturers are not allowed to share information, designs, or technical knowledge about their power units with other manufacturers. They also can't hire consultants from competing manufacturers or copy performance improvement methods from rivals. This rule keeps competition fair by preventing manufacturers from gaining unfair advantages through information sharing.
- Manufacturers cannot share power unit designs, data, or intellectual property with competitors
- Teams cannot receive consulting services or technical advice from rival power unit manufacturers
- Performance enhancement methods and methodologies must be developed independently
- This ensures each manufacturer develops their power units through their own innovation and research
Official FIA Text
PU Manufacturers must not pass information/data/designs/IP regarding LPUC to other manufacturers, receive consultancy from other manufacturers, or transfer performance enhancement methodologies.
Article C17.1.11
Technical Partner
Chapter: C
In Simple Terms
A Technical Partner is a company or organization that works with an F1 team to provide technical support, expertise, or components for the car. This regulation defines what qualifies as an official technical partnership within F1 teams.
- Technical Partners are officially recognized suppliers or collaborators that contribute technical expertise to F1 teams
- These partnerships are formally defined and regulated under F1 technical regulations
- Technical Partners may provide anything from engine components to aerodynamic development
- The definition helps F1 maintain transparency about team structures and external technical support
Official FIA Text
Technical Partner has the meaning set out in C17.1.11.
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