Some digital car features remain with the vehicle after a sale; others depend on a subscription, account or contract that does not transfer automatically. There is no reliable brand-wide yes-or-no answer. Check the exact service, purchase type, expiry date and manufacturer terms for the individual car before paying extra for it.
A test drive establishes that a feature works today. It does not establish who is entitled to use it next month. For a used BMW, Mercedes-Benz or Porsche, that distinction now belongs alongside the familiar checks for mileage, service history and factory options.
Separate hardware, activation and connected services
Start by asking what the seller is actually offering:
- Factory equipment: hardware or equipment recorded when the car was built.
- A permanent software upgrade: a paid activation intended to operate for an unlimited period or the vehicle's service life, subject to the applicable terms.
- A time-limited feature: an activation with a stated expiry date, including a trial or subscription.
- An account-based connected service: a service that also requires the correct user account, vehicle association and service contract.
These categories can overlap. A car can contain the necessary hardware without an active entitlement, and an eligible feature may have been purchased after delivery. The factory record is therefore a starting point, not a live inventory of every digital service.
Porsche: a clear distinction between unlimited and monthly purchases
Porsche's UK Function on Demand guidance for Taycan model years 2020–2024 gives a useful concrete example. It says an unlimited Function on Demand purchase remains valid for the car's service life when the vehicle is sold. A monthly contract should instead be cancelled by the seller.
The same guidance states that new monthly purchases stopped in September 2024, while existing monthly arrangements can continue. An older Taycan may therefore have a different purchase history from another apparently identical car.
Ask to see the named function and whether it was bought for an unlimited period or remains on a monthly contract. Do not extend this answer to every Porsche Connect service: the cited guidance concerns a particular product and model-year range.
BMW: distinguish the vehicle feature from the service contract
BMW's UK ConnectedDrive terms revised on 30 January 2026 state that the customer cannot transfer the ConnectedDrive contract to a third party without BMW's consent, including when selling the vehicle. They also address informing the buyer about activated or deactivated services.
This does not establish that every factory-fitted or permanently activated BMW function disappears on sale. It establishes that buying the car and taking over the seller's service contract are different events.
For a specific BMW, ask the seller to show the service name, duration and purchase record. Then confirm the present ownership-change requirements with BMW for that VIN and service. A menu screenshot alone may not reveal the underlying contract.
Mercedes-Benz: verify Digital Extras against the individual vehicle
Mercedes-Benz's UK Mercedes me ID guidance explains the account connection used to activate and manage Digital Extras. For a used car, the practical check is the specific extra's eligibility and status once ownership and account association are handled correctly.
Do not assume that a Premium or Premium Plus trim description settles this question. A factory package and a connected-service entitlement answer different questions. Ask which Digital Extra is included, whether it has an end date, and what the new owner must do to use it.
If the seller cannot demonstrate the entitlement, seek confirmation from Mercedes-Benz before including that feature in your comparison of asking prices. Avoid accepting a promise that it can “just be switched on” without evidence of eligibility and any cost.
The evidence to request before agreeing a price
- Name the feature precisely. Record the manufacturer's product name rather than “all connected features”.
- Match it to the car. Confirm the VIN and account's vehicle association without collecting the seller's password.
- Check the purchase type. Ask for evidence of a permanent purchase, trial or renewable contract.
- Record the expiry date. An active service with two weeks remaining is different from an unlimited activation.
- Confirm the handover process. Use the manufacturer’s current instructions for that service, including any buyer registration or reactivation.
- Document what is included. Make the sales description precise enough to distinguish the vehicle's equipment from ongoing digital services.
After handover, verify the expected features in your own account and in the vehicle. Do not keep using the previous owner's login as a substitute for establishing the correct entitlement.
Account removal is a separate handover task
Connected cars can retain personal profiles and account links. BMW's UK privacy guidance distinguishes removing a vehicle from the account from resetting personal data in the vehicle. Follow the relevant manufacturer's procedure for both sides of the handover.
This administrative work does not replace the equipment check. Use the factory-build-sheet comparison to understand what an original specification record can establish, then verify digital entitlements separately.
Frequently asked questions
Does a working feature on a test drive prove it transfers?
No. It may be running under the seller's subscription or a trial. Establish the purchase type and ownership-change rules.
Does a factory build sheet show subscriptions?
Do not rely on it as a live subscription record. Later purchases, renewals and expiries require current service information.
Should I pay extra for an undocumented digital upgrade?
Confirm its entitlement first. If its continued availability matters to your buying decision, resolve that point before agreeing the price.
Compare the car's original specification through our BMW, Mercedes-Benz or Porsche pages, then keep the digital-service evidence alongside it. That gives you a clearer record of what the car was built with and what you can expect to use after purchase.