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I just had tyre, discs and brakes replaced on GLA 45 5 years old. Out of warranty so went to local mechanic as Mercedes quote took me by surprise. The brakes are so soft now. Previous they were responsive to lightest touch now I have to push down a long way before they engage. Very worried and upset that I have done the wrong thing getting it done. Any advice welcome. Love the car but I am no “handyman” that can do self fixing
 

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Did they replace the brake fluid as well? If so, they may not have bled the brakes properly. Any air bubbles in the lines will contribute to a soft pedal feel.
Or they may not have adjusted the brake calipers properly to the new rotors, with too much initial pad gap.
 

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Did they (or have you) bedded the brakes?

This should be done right after the parts change.
 

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As brake fluid is hygroscopic (absorbs water from the air), and the system is actually open to the environment, brake fluid should be flushed every two years anyway and especially when installing new rotors and pads.
 

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As brake fluid is hygroscopic (absorbs water from the air), and the system is actually open to the environment, brake fluid should be flushed every two years anyway and especially when installing new rotors and pads.
Yea my car actually had water in the fluid right from the start, The first winter the brakes would freeze up and when i tried to start the car and go it was bad. I would bite the bullet and go to the merc dealer just for new fluid/flush.
 

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I just had tyre, discs and brakes replaced on GLA 45 5 years old. Out of warranty so went to local mechanic as Mercedes quote took me by surprise. The brakes are so soft now. Previous they were responsive to lightest touch now I have to push down a long way before they engage. Very worried and upset that I have done the wrong thing getting it done. Any advice welcome. Love the car but I am no “handyman” that can do self fixing
And the local shop replaced rotors and calipers with MB parts or some "equivalent" (likely lesser quality) parts? And as mentioned a proper brake flush would be needed as well, and the new parts will take a bit to burn off new whatever and seat properly.
 
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