So how good is the M103 engine?

[strelnik]

I have a chance to buy a clean 91 300SL for a pretty reasonable price. Mileage 137,000.


The car had a fuel delivery problem which the current owner solved by jumping the system with a wire directly to the fuel pump, which he has to disconnect separately each time he stops.


I am not familiar with the fuel controls, but this sounds like a fuel relay issue.


But the real question is: How reliable is the M103 engine?


I have heard negative stories, just wondering if any current or prior owners can shed some light.


Thanks!