Exactly. If it needs new keys that tells me the keys are bad and maybe
the EIS is not working, but a new key should be programmable to match
the existing keys and the rest of the car. The lock module gets told by
the EIS to unlock, and for the ECU to start the engine. So now I am
wondering if there is a bad key(s) (which wouldn't be likely for both to
be bad) or just the EIS is not recognizing the existing keys.
" The key turns all the way in the ignition but there is zero response, no clicks or
sounds. "--> so this says that the key WILL turn so somehow the EIS is recognizing
it to allow it to turn, so the key is actually good and the EIS is good. If either is bad
then they key won't turn in the slot. Does the instrument cluster come alive when the key
is turned? If the car is not coming alive, but the key will physically turn (and here I'm
assuming it is a slot on the dash and the key is a fob), then I'm thinking a SAM or CANBUS
error or power issue is preventing the EIS from talking to everything else. I had a similar
problem on the CL500 when the power cable under the passenger front floor was loose, the IC
was dead as were windows, but the engine would start and steering worked etc.
First I would dig into the whole thing with DAS/Xentry and see which
nanny is actually unhappy and if there are any CANBUS errors or events.
Or bad power at the modules in question, which would point to a relay or
fuse driving the circuits. Maybe they did that and decided their
recommended fix was best (for them, not necessarily for the owner, and
maybe they are just lazy or ignorant).
Then check a good key, just pay for a third key programmed to the car,
looks like $235, that's quick and easy and in any case you would have a
new key. (But here if the key is turning, I am thinking the key is
good) If that doesn't start it then put in an EIS and program it to the
car and do a key match with it (this can be done in Xentry easily in
about 5min) and see if that works. Labor on that should be maybe 1hr.
(And again, if the key physically turns that suggest the EIS is OK?)
And if that doesn't work and the lock module is still bad then I would
think that it was the culprit all along. This would be the best strategy
given parts + labor on each step, the lock module is going to be the
killer with the labor. But someone adept with Xentry should be able to
figure out exactly what the issue is and not shotgun $3k worth of parts
and labor at it. I have a hard time thinking that keys EIS and lock
module all went bad at once, esp since the key will physically turn.
--FT
On 9/28/23 2:08 PM, mitch--- via Mercedes wrote:
On 2023-09-28 13:36, Floyd Thursby via Mercedes wrote:
So this makes me wonder what exactly might be wrong with it.
I look at the quote and think: Is it the ignition lock or the module
that's bad?
And are you charging me for both because you don't want to strand me
when the second one fails, or are you charging me for both because you
don't know what failed?
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--FT
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