Hybrids are a different breed, they're very very bad. Don't ever buy one out of warranty and be REALLY sure what the warranty covers.

FYI: Mercedes Benz hybrids have a full(*) battery warranty. What's the asterisk you ask? The warranty only covers repairs up to the car's current value. Which has plummeted over the few years you've owned it and the cost of the battery is absolutely ridiculous. Like "buy 3 used Leafs" ridiculous.

Most hybrid batteries are also blobs of molten plastic and silicone that can't be repaired at all. EV batteries are constructed of semi-standard cells and can be opened and repaired piecemeal by specialist shops. Official repairs usually just swap the whole thing - again for a massive cost.