I had the 190E taken for an oil change at the local shop. While that was being done I noticed the brake fluid was a bit low. So I had the mechanic top it off. However I noticed that the fluid he used was wagner DOT 3.
I know the benz is supposed to have DOT 4, my question is will that hurt the braking system ? Should I have it flushed just because there's a bit of DOT3 in the system mixed with DOT4 ?

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