This one has an IR emitter you aim at these sensors on the door and
trunk lock area, each of those has the red/green indicators to show
un/locking. It is a 600! So it has to be more complicated!
-_FT
On 8/9/19 4:15 PM, Dan Penoff via Mercedes wrote:
The key has an RFC chip in it, the battery shouldn’t have any effect on it’s
ability to start. Same reason why a “Mickey Mouse” key will start and run the
car as well.
Just for grins, try the remote at each door and the trunk in the dark. I say
that because my 1997 SL500 fob won’t work in the daylight, but will in the
dark. I can only assume that something has weakened the fob (this is with brand
new batteries) or the system isn’t as sensitive as it used to be.
-D
On Aug 9, 2019, at 4:11 PM, Floyd Thursby via Mercedes <mercedes@okiebenz.com>
wrote:
Last week I thought I had locked the SL with the IR remote that shines at
receivers on the doors and trunk. They have red and green lights that blink
red when it locks, green when it unlocks. I have noticed that the lights don't
all work, a green on one, a red on another, I think neither on the trunk, and
sometimes the key remote won't activate different lock receivers. Maybe the
batteries are getting low in the remotes, I'll have to check them. These fobs
have a key that flips out of a rectangular housing when you push a little
button, then a larger button to work the remote signal.
So I went to get in the car, hit the remote button aimed at the driver door,
then got in. Tried to start the car, no go. Ugh. Finally got out and fiddled
with the battery cables, tightened them, whatever. Then it started OK. Same
thing happened Wed evening, fooled with the battery, still no go. I know the
battery is good so it was confusing. So for some reason I tried the remote
again at the driver door, which was open, and then tried to start the car and
bingo it worked. So I am trying to figure out if the door receiver is funky,
or the key, or what. i guess first thing is to change key battery.
I guess this must be some immobilizer feature, ignition is disabled if the
locks are locked, although the driver door did not seem to be locking which is
why I could open it even though the car thought it was locked.
This thing gives me fits!
--
--FT
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--
--FT
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