BMW 545i Questions

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I replaced my brake booster on my545i and the brakes are still stiff I bled the brakes and there is no leak from the master cylinder. Someone tell me what else can be wrong or what can I do to fix this
The car is hiccuping and lunging sometimes.
What type of transmission fluid should I use?
Code P1400 and P1405 and the solution to fix it.
Was wanting to find out what might be causing the stereo to have no sound also the doors or seat belt warning don't ding
I do not here fuel pump running. and will not start...battery went dead afterwards ran but very bad, now will not run at all is it sleep due to security system or what?
Why can they fix how much will it cost
I hear a metallic dinging noise coming from beneath the car when pulling away from a stop. Noise is not lot but seems to be coming from underneath car by manual shift. Could it be clutch or dive shaft?
These issues are constant anytime I attempt to use voice commands to access these systems. Service info system is grayed out and inaccessible. Guidance system does not announce street names.
When I take it off it tries to die but I looked at my ccv and they look good what else can it be
I noticed antifreeze on the driveway coming from the bottom of the car a couple of days ago. I kept replacing it until I could take it to someone but now there's NO anitfreeze on the ground, still losing it and it running hot (no gauge just to touch).
was a big deal until I recently had a complete electrical failure. AAA said the charging systems operating and the battery needs charge but its in good condition as well. What would sent a bunch of alarms off and totally kill the electrical system. It also will start back up later. Help please
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