W124 battery light flashing and Abs flashing and oil pressure guage at zero

[AV]

I recently had my cluster sent out for repair as the oddo /counter wheels had to be replaced.
Once it came back it was all well but i dont use the vehicle too often.
Since the last two days the flashing of battery /ABS and no oil pressure symptoms have occured.
I did get the charging systen checked out and all is good, alternator charging and battery holding , so what can be the cause?
Your opinions will be appreciated.
Its a 1988 300E with about 121000KM.
Yhank you
AV