[RobRed]

2019 m5 Base with 22,400 miles. Stock.

An intermittent groan / squeal from under the car (not the previous sound i started a thread on eons ago). Cleared itself but repeated several times. Not rotational in sound - sounded like the rear differential. NO grinding or change in driving behavior. No MIL or message showed.

This morning the car started with the following iDrive Messages:


- Continued driving possible: Chassis

- Emergency Call System Malfunction


Further investigations reveals the following DTCs via Bimmerlink:

Vehicle Dynamics Management | 4828EC Rebound Front Left Open Line

Combox Emergency Call | 031789 SIF:Remote Service

Combox Emergency Call | B7F343 Backup Battery: Before End of Life

Car Access System | D90D12 SMO:unexpected LIN slave

Motor Electronics | CD8E12 LIN, communication (generator): missing

Tailgate Function Module | 801724 Vehicle Speed greater than zero when actuated