The honeymoon is officially over on my 6.9.

Today I had a caliper lock up and catch fire briefly. I let the car sit and cool for 30 minutes, then limped it home so I could yank the caliper. I took the brake to Bob's to find another to swap out, but Bob played with it and said it was working perfectly.

So, I went home, re-attached the caliper, and tried to bleed the brakes. It was just barely a trickle.

Took the car on a 20 minute drive or so, and after 100 stops finally got the confidence to take it up on the highway. Something didn't feel right, so I exited, and this time the right front caliper was smoking.

I can free the caliper again, but they refuse to bleed, and I've introduced air in the system giving some pretty severe fading.

Using the search feature I have come to similar threads where people suggest the rubber brake lines have collapsed causing the calipers to stick and unable to bleed. Sounds like it fits the bill perfectly.

I wish this happened one day earlier, so I could have gotten the parts to do the job over the weekend. Oh well.

Any other suggestions? The only inconsistency to the other threads is it hitting both wheels at different times. Could something further up the brake totem pole be causing this? The lines will certainly get changed anyway, since they look very old, but I curious if there's any other ideas to the cause of the issue.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!