Does a 'severe knock' and smoky exhaust upon cold start signify imminent failure?

[HOV]

The 2008 318d was functioning optimally until I inadvertently allowed a handbag to become lodged behind the gear stick while the vehicle was in motion. Consequently, the car revved excessively out of gear, as it failed to shift due to the obstruction. The engine subsequently stalled, but it restarted slowly, only to falter again on the first incline, losing power and displaying an alternator warning. Electrical systems, including the doors and brakes, ceased to function despite having driven for an hour without issues. The garage will only assess the vehicle after Christmas; it is operational again, but the mechanic reports a significant knocking sound and smoke upon cold starts. Given the age of the car, he suggests that repairs may not be worthwhile, as it could indicate a severe engine issue.

The vehicle was operating exceptionally well and covering considerable distance without any problems until I made the imprudent decision to search for chewing gum with one hand while navigating slowly through traffic while entering a town, inadvertently causing the bag to drop under the gear stick.

[VVC-Geeza]

Does it have an odour reminiscent of fish?

[HOV]

I am uncertain; the vehicle was taken to the garage, and the technician is currently driving it to and from work to identify the issues. He mentioned that it only emits smoke on cold mornings, but he could not specify the odour he detected. I observe that it is indeed a significant identifier.

[markjay]

What is Pollok's flavour?

[VVC-Geeza]

acquired crabs