On Sun, 28 Feb 2021 07:43:36 +1100, "Fred" wrote:


Fact is, microprocessors do fail.

Fact os even the dealer doesn’t replace a failed microprocessor
in the ECM. The whole thing is refurbished by a specialist in the
rare situation where one of the microprocessors has failed.

Not. Under warranty they are REPLACED with NEW parts.

Off warranty SOME are remanned - more are replaced with used. (and
THAT is a very comnplex procedure too - - -

Just replace the radio? A head unit for my car lists at $3000.

No one internally repair the radio anymore unless
it’s a simple cabling fault or something like that.

The more you go on how simple it is the more you show how little you know
of new cars.

How odd that I am in fact assisting that mate of mine
with reprogramming the ECM in those Mercs and with
getting the right radio unlock code as well.