I did manage to replace those bulbs myself, and it's ridiculous, it has some sort of spring to hold it in place that is extremely hard to open with your fingers, and even harder to close. And on top of that you can't even see it, you have to take first pictures with your phone, understand how it works and then go entirely by tactic feedback
The battery is in a compartment in the left front wheel well. You have to remove that wheel to access the battery.
I was instantly impressed by the pure creativity and artistic expression the team employed for that design.
I recommend to never go to the dealer, unless you're going there for a warranty or recall repair. A local repair shop is always the better option. And if you don't know of a trustworthy local shop, take it to the dealer for an estimate, and then you know if the local shops are bullshitting you (they should come in way under dealer prices).
Even within an organization, creating externalities from one department's perspective seems common enough.
Even if a decision maker is aware of the possibility of externalities and cares about a broader constituency (temporal or "spatial"), evaluating actual costs is an expense as is justifying that investigation expense and any mitigation/avoidance expenses to others in the decision web.
All of them have been in Ford (or Saturn).