Tesla has started merging its two software branches, and the first cars to get the result are in Europe.
Firmware 2026.27.100.1 began rolling out on 24 August 2026. It carries FSD 14.2.2.6 for Hardware 4 vehicles and the 2026 Summer Update in the same release — the first time a car on the FSD branch receives the feature set that non-FSD cars have had for weeks.
Why FSD cars were behind in the first place
Tesla develops vehicle features on its main branch and FSD on a separate one. New features merge into the dev branch; FSD builds do not automatically inherit them. The practical effect is one owners of the option know well — you pay for the driving stack and then wait longer than everyone else for the infotainment and navigation work.
The Summer Update made that gap unusually visible. It shipped as firmware 2026.26 at the end of July for cars without FSD, and cars with FSD simply did not get it.
What arrives in the merge
The Summer Update feature set, now reaching FSD vehicles:
- Preferred Routes — navigation prioritises roads you already drive, instead of always defaulting to the fastest algorithmic suggestion. Requires Online Routing.
- Grok vehicle commands — voice control of car functions through Grok, on AMD-based cars.
- Supercharger search by name — find a specific site by name rather than hunting the map.
- Set Arrival Energy — choose the charge level you want on arrival, from the mobile app.
- Driving visualisation zoom — a saved zoom preference for the driving display.
- Caraoke with scoring, Apple Music queuing, camera preview while driving, custom wrap uploads from mobile, and touch input on the rear display.
Some items remain gated on infotainment silicon rather than on this release: browser camera access and the Grok features need AMD Ryzen hardware, as they did in 2026.26.
Rollout status
| Firmware | 2026.27.100.1 |
| FSD build | 14.2.2.6 (Hardware 4) |
| First region | Europe |
| Fleet penetration | 0.2% as of 24 August 2026 |
| Expected next | Oceania, then North America |
At 0.2% this is an early wave, not a general release. Treat the version number as confirmation that the merge is real rather than as a promise about when your car sees it.
Why Europe first is worth noticing
Tesla does not usually start a European rollout. The reading that fits the facts is one of scale: FSD (Supervised) has national approval in only five European countries — the Netherlands, Lithuania, Estonia, Denmark and Belgium — so the European FSD population is the smallest and newest of the three regions in question. A branch merge is exactly the kind of change you would validate on the smallest affected fleet first.
That is a reading, not something Tesla has stated. What is stated is the sequence: Europe now, Oceania and North America to follow.
Still waiting
Hardware 3 cars running FSD v14 Lite in North America are not part of this wave and have no merged build yet. If you are on HW3, the branch gap that this release closes for HW4 owners is still open for you.