[neanderthal]

some of you are posting doo doo.

the knock sensors are only available on the M104 engined 124s. the M103 engined ones do not have knock sensors.

if they detect pinging they pull the timing. so your whole the fuel burned my cat tripe is just that, tripe.


as stated already, the cats will get fried if you use leaded fuel.
if your cats are gone with unleaded then you have another unresolved problem that changing fuel octane might hide, but not eliminate.