Just my .02 cents here. I've found that not all DOT 4 performs the same. So it's a long story but basically when I changed my brake system I bought the ATE Super Blue fluid. My motorcycle takes DOT 4 as well and I figured since it is a high performance bike and others have had good response with the Super Blue, may as well replace it too. I did so, had a good brake, then after sitting for a few days, no brake and air in the lines. This continued for months and people kept saying I didn't bleed it right/enough. Eventually I figured it couldn't hurt to try another fluid, bought some cheap Valvoline DOT 4, installed it and not a problem since. This relates to my car too, but like I said, long story.


Bottom line, it has led me to believe it is better to go back with stock and I've been thinking about putting the MB fluid back in my car to see if it give a more firm peddle.