SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: Replace Key Fob Battery?

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Old 03-29-2013, 06:16 AM
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Replace Key Fob Battery?

Two days ago I picked up the car after the 10,000 service. The next day (what do you expect) I got the replace key fob battery.

My Corvette's key battery lasted five years.

If the keys battery is dead, will the car still start with the key in the ignition?
Old 03-29-2013, 11:05 AM
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I just changed the battery in the key fob and all is well again.

On the first start, the MFD, showed the fob battery low. I restarted the engine and the warning went away. All bow the the electronic Gods.
Old 03-29-2013, 02:23 PM
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Good to see it worked , a friend of mine said that you can remove ENGINE START STOP button on the dash and start your engine with a conventional way , by inserting your smart key in it's place should key fob's battery goes dead
Old 03-29-2013, 05:04 PM
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Yes you can remove the button in the dash; but to replace the key batteries you just need to remove the valet key and then within the slot there is a lever to release the cartridge that holds the two batteries. Get them at Radio Shack.

It's the same set up as the key to my CL and SL.
Old 03-30-2013, 05:05 AM
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I like the way the fob opens for a new battery. On my '08 Z06, I had to use a dime in a slot and twist it to open, the tab that holds it closed broke.

My big question was, with a dead battery, will the fob start the car when it is inserted in the ignition?

I'm guessing that it's keyless function will not work way before the battery is dead.

Last edited by Daytona-flyer; 03-30-2013 at 05:07 AM.
Old 03-30-2013, 06:49 AM
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Originally Posted by Daytona-flyer
I like the way the fob opens for a new battery. On my '08 Z06, I had to use a dime in a slot and twist it to open, the tab that holds it closed broke.

My big question was, with a dead battery, will the fob start the car when it is inserted in the ignition?

I'm guessing that it's keyless function will not work way before the battery is dead.
yes, you can take the battery right out of the fob and then insert it and it will turn to start the car.
Old 03-30-2013, 08:10 AM
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Yes it will.
Old 03-30-2013, 08:18 AM
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Cool.

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