Date registered: Oct 2010
Vehicle: 2000 ML430 (Sold)
Location: Saskatoon, SK, Canada
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Shitake Mushrooms - Caliper Piston Stuck
The front brakes on my ML430 are apart at the moment. I was looking into a noise that the brakes make when pedal is pushed and found that on both driver and passenger sides one of the lower caliper pistons was not coming out with the other pistons.
After blocking the other three pistons from moving i stepped on the pedal and was able to free up the lower stuck one on each side.
Of coarse now i can not get either one to depress and go back in.
The pump action clamp i usually use for depressing them surprisingly does not have the force to push it back in, nor does any type of pry system i can come up with.
I will go and buy a proper metal c-clamp if needed, but would like to check on what may be happening and what i may destroy if i push to hard with the clamp.
I'll add a pic later if anyone can't understand whats happening.
50% of the time, its the brake light switch 100% of the time.
The other 75% of the time it's not.