smart key battry lifetime
Senior Member
Joined: Mar 2002
Posts: 291
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In a 95.. i changed my battery about (2 of them in the key) after 5 years or so. You will notice that it doesnt work as well from far away...
I think it was 5 bux at radio shack... sure its cheaper elsewhere if u hunt for them
~fk
I think it was 5 bux at radio shack... sure its cheaper elsewhere if u hunt for them
~fk
Newbie
Joined: Feb 2003
Posts: 9
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From: Rhode Island
2001 C240
My smartkey battery was replaced after only a little over 1 year of daily use. At first I didn't know what was going on since the key would fail to work only occasionally. I was afraid there was a problem with the key itself as I remembered reading some post about Smartkey failures. I complained to the dealer about the problem and they simply replaced the battery for me with a $17 charge. Needless to say I felt taken.
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Joined: Jun 2002
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Brabus w203
Originally posted by RI203
My smartkey battery was replaced after only a little over 1 year of daily use. At first I didn't know what was going on since the key would fail to work only occasionally. I was afraid there was a problem with the key itself as I remembered reading some post about Smartkey failures. I complained to the dealer about the problem and they simply replaced the battery for me with a $17 charge. Needless to say I felt taken.
My smartkey battery was replaced after only a little over 1 year of daily use. At first I didn't know what was going on since the key would fail to work only occasionally. I was afraid there was a problem with the key itself as I remembered reading some post about Smartkey failures. I complained to the dealer about the problem and they simply replaced the battery for me with a $17 charge. Needless to say I felt taken.
definitely taken
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Posts: n/a
my batteries died on both keys a month ago (would be a year in sept). now i enter the car using the metal key. before the alarm would come on, i'd put the smartkey into the ignition. no, i'm not cheap, i'm just too lazy to go change the battery. 
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MBWorld Fanatic!
Joined: Nov 2001
Posts: 2,465
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From: SF Bay Area
2002 C230 K
I was at the dealer once and there was this older guy raising Cain because of his SmartKey had failed after they had just replaced the battery. The guys at the counter popped it open and the insides were totally corroded.
They looked at him and said, "Hmmm.... Looks like it went through the washing machine."
- BT
They looked at him and said, "Hmmm.... Looks like it went through the washing machine."
- BT
Admin Alumni
Joined: Nov 2001
Posts: 8,143
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See Garage
Originally posted by moomeh
my batteries died on both keys a month ago (would be a year in sept). now i enter the car using the metal key. before the alarm would come on, i'd put the smartkey into the ignition. no, i'm not cheap, i'm just too lazy to go change the battery.
my batteries died on both keys a month ago (would be a year in sept). now i enter the car using the metal key. before the alarm would come on, i'd put the smartkey into the ignition. no, i'm not cheap, i'm just too lazy to go change the battery.
That's some MAJOR LAZY... (Just having some fun, moomeh!)
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Joined: Nov 2001
Posts: 8,143
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Originally posted by Matt230K
But only if you locked it with the remote, right?
But only if you locked it with the remote, right?
Turns out the batteries were jostled loose in the remote. Once I bent the metal contacts to grip the batteries better, the problem went away.
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From: Ohio
2010 C300 4matic
Ok, that's what I thought, I just didn't want to state it as fact. moomeh said he would put key in ignition before the alarm would go off, but I didn't think it ever would because he obviously would have locked it with the metal key as well, and thus no alarm.
