Sounds like you need a lot more than pads.

Sounds like a leaking master cylinder and/or sticking rear brake caliper/failed hose.



You need to have someone who knows what there looking at check out the brakes. How were the seals around the pistons? Could you depress them without to much effort? Are the hoses original, most likely they are.

If it were my car I would throw a new master cylinder on it, plus a set of hoses all around and flush the sytem with some ATE DOT 4. Luckly rear calipers are cheap so if I suspect those I'd throw on a pair, maybe some discs and do the bearings while I was back there since they have probably never been touched.

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2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200