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Resolved. I had the ESP warning light on and an ABS warning. This was fixed by changing the brake light switch (£10 part and 15 minutes to replace it) I had hot brake discs and low MPG. The rear brake discs were hitting 110-120 degrees after a long run and the MPG was about 15-20% lower than...

I measured the piston on the one I replaced with calipers and it was exactly the same size all the way down the piston but not sure if the whole thing was swollen a bit? It was definitely a bugger to get back in once I had taken it out. Much harder than I thought (I had to use a vice to get it...

Quick update, the caliper I changed looks to have worked. The same journey I did last week saw the brake disc reach 110-120 degrees and today it was a cool 40. Checked the other wheels and the other rear was a bit hot so thinking I may change that caliper as well. The mew flexi brake pipes get...

The pad wasn’t the easy fix I’d hoped for. Changed the caliper today. The flexi pipes definitely need doing soon (perished although brake fluid was flowing freely through them). Will take it out over the weekend and test the heat and MPG problems I was getting. Took some pictures of the...

Thanks for clarifying. I took off the carrier off and cleared out all of the crud. Cleaned them off, cleaned the caliper before I fitted the new pads.

Checked the wheels today. Passenger side moved easily. Drivers was stuck. Pads move freely on both wheels. Drivers side the of that fits into the piston was loose compared to the passenger side. Almost like the metal clip that holds it against the piston wasn’t working as it should. I bent...

I’ll check over the pads and take a look at the pistons at the weekend. I’ve got a pair of new callipers waiting for me if I need them.

Replacing the brake light switch seems to have solved the ESP warning light and the run flat warning. Did 200 miles today with no warning light. So must have been a coincidence that failed at the same as the pads were changed.

Thanks for clarifying. I took off the carrier off and cleared out all of the crud. Cleaned them off, cleaned the caliper before I fitted the new pads.

I read somewhere that the brake pedal/light switch can cause these symptoms so have changed it tonight and will test it tomorrow. Doubt it will affect the hot brakes but may eliminate the warning lights and leave something mechanical like the line pressure?

Help me out here. The pad that sits on the piston side clips firmly into the piston so not sure what you mean by ‘hangs up in the caliper’. As far as I can see there is no upward/downward movement of the pad on the piston side. Just in/out movement. How would I tell that the pad is hung up in...

The warning light for the run flat indicator comes in 20 seconds after a cold start once the brake pedal has been pressed twice. Even without the car moving. And always with the ESP warning. If I don’t touch the brakes the warning light doesn’t come on at all even if I drive it for ages.

The wheels could spin as the piston was pushed all the back when they were fitted. The pistons went back nice and easily too. The guide pins were cleaned, greased and refitted. Everything looked ok when they went back together. The poor fuel economy happened immediately and the warning lights...

Did some more testing today and it looks like both rears are much hotter than the fronts. Tested them a few times after long runs and the rears are 120-130 degrees whereas the fronts are 50-60. MPG is down by about 10-15%. ESP and run flat warnings remain on and it comes on exactly after the...

It was the engine mounts that needed replacing and once done the issues never returned.

Changed the rear pads and noticed poor mpg on a long run so checked temp of discs and rear o/s was 120 degrees whilst the other 3 were about 60. Then the ESP light came on and a warning that the run flat indicator was inactive. On idle the warning light won’t come on. When you press the brake...

Tracking done, steering wheel straight and no ESP light. Just need to keep an eye on the other side now.

Car is back. They had to replace the inner bush and retaining bolt as well as the arm. Now the steering wheel is off centre in the other direction and the ESP light comes on at 60+ whereas before it came on at 25mph. Need to get it back to the alignment centre and then hopefully it will be...

Took it for tracking and they diagnosed a split in the lower arm. Super dangerous was their opinion. New arm is about £250 from MB apparently. The car is in the garage having it replaced.

I did a 200 mile motorway drive and when I was pulling into my road at the end of it the ESP light came on. Next day I drive to work and noticed the steering wheel is about 20 degrees off to the left. If I held it straight I would be in the hedge within 10 metres. I can’t remember hitting...