Restraint system fault, abs fault, control systems fault, no speedo, wipers on constanly

[dimitripavlovits]

Hello all,

Apologies, I've seen similar posts here a few times, but none of them has had the answer or I've tried it and it's not sadly fixed my issue.

A few days ago while driving I had multiple warning lights coming on, a car drove but there was the following issue:

- Restraint system failure
- Control systems failure
- Steering assistance failure
- Parking brake fault
- Wipers are constantly on with no way to turn them off
- No speedo
- None of the steering wheel buttons worked
- Power steering gone
- Roof not operational (excessive angle message)

What have I tried?

- Battery replacement, coded, left the car to rest overnight. - This fixed the issue for few hours and then it was back.
- Checked all fuses
- Checked positive and negative cables at the engine bay
- Checked all the cables under the seats
- Removed the battery and put positive/negative clamps together to reset electronics (saw this as a suggestion on one of the posts)

Few things to note:

I drove the car till the battery was full (took 1h from 73% to 99%), next day battery was at 93% - feels like excessive drainage?
The issue goes away if the car sits for a few hours, but comes back after few minutes of running.
While driving sometimes the issue "lessens" and wipers work normally and some fault codes disappear (speedo still does not work)

The Car: BMW E89 Z4 Sdrive 3.0i, 46k miles, recent service ( month ago).

I've attached codereads.