C5 Brake Fluid Warning Spongy Pedal

Sounds familiar! I had similar symptoms on my old Volvo V70. Low brake fluid can definitely be a sign of worn brake pads. As the pads wear, the fluid level drops to compensate in the reservoir. Have you checked the pad thickness?

Thanks for the quick reply. I haven't checked the pad thickness myself yet. Is it something I can easily do, or do I need special tools? I am a novice with car repairs.

It's doable, but honestly, if you're not confident, best leave it to a pro. Brakes are kinda important! If the fluid's low and the pedal's spongy, topping up the fluid is just a band-aid if the pads are shot. Like putting more air in a tire with a nail in it. I'd get it checked asap.

You were spot on. Took it to the shop, and it was worn brakes as we suspected. Cost me 480€, including brake fluid replacement. Thanks for the advice!