i have a 91 sl and i had battery probems and i jump it and made so much other probems please do not jump it
The key battery for the ls400 is PN# br1216 www.lextechautomotivellc.com
According to the 2006 Ford Five Hundred Owner Guide : Each key fob takes ( 1 ) coin type three volt lithium battery ( CR2032 ) or equivalent
The Audi Key (with built in small light bulb) takes a PX625A battery
Open the key fob and remove the battery which has a # on it, and then buy a duplicate.
By using your key to unlock the door.
With the key inserted into the lock.
CR 2032
Open the key fob, remove the battery and look and see what size it is.
You can pull out the metal key that won't work in the trunk and then jump start the car from the battery.
cr2032
Panasonic CR1618
To unlock a 2002 Mercedes SL 500 with a dead battery, you can use the mechanical key hidden within the key fob. First, remove the key by pressing the release button on the fob. Then, locate the small keyhole on the driver's side door handle and insert the mechanical key to unlock the door manually. Once inside, you can access the battery to jump-start or replace it.