During the course of my strut/shock replacements I noticed that all four rubber brake lines are VERY cracked.

I occasionally have a mushy brake pedal as well.

The master cylinder/fluid reservoir looks very new suggesting to me that the previous owner replaced them.

My question is can I just unscrew the existing brake lines and replace them or is there some process where I have to bleed the ABS system?

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1993 W124 300D
-297K on the clock as I type this.