Battery dead - keyless go not working
Thread Starter
Junior Member
Joined: Feb 2005
Posts: 18
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From: Extreme NE Iowa
2004 E320 4matic
Battery dead - keyless go not working
Car sat in the garage much too long, so battery totally dead. Charger brought it back to life, but now several features are not working: Keyless go start-stop button, (have to use the key in ignition), door locks (except when car starts moving), Command screen is intermittent, (GPS & audio),
Is there a reset? Have never had this problem. Purchased the Benz trickle charger now...after the horse is out of the barn! Main battery is new, but front (auxiliary) battery is original, think it need replacing.
Is there a reset? Have never had this problem. Purchased the Benz trickle charger now...after the horse is out of the barn! Main battery is new, but front (auxiliary) battery is original, think it need replacing.
Last edited by ale; Feb 21, 2013 at 03:49 PM. Reason: clarify
MBWorld Fanatic!
Joined: Jul 2006
Posts: 1,779
Likes: 11
From: Long Island, NY
2004 E320
I can't answer your questions. However, I had the same result re the keyless go and doors when I disconnected my battery for about an hour. Never found the solution, so curious to follow this thread.
Here's my thread from back in October : https://mbworld.org/forums/e-class-w...isconnect.html
Here's my thread from back in October : https://mbworld.org/forums/e-class-w...isconnect.html
Last edited by starbrite; Feb 21, 2013 at 05:20 PM.
Thread Starter
Junior Member
Joined: Feb 2005
Posts: 18
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From: Extreme NE Iowa
2004 E320 4matic
thanks for your comment...
I visited with a MB tech yesterday. We concluded the front "auxiliary" battery was probably in need of replacement since it was original. The main rear battery had been replaced in 2009. Car starts now with the FOB key in the ignition, but door locks do not work with FOB or the exterior black door lock button. GPS & audio on the command screen are working normally.
Will have the front battery analyzed when I get to the dealer...160 miles away...weather permitting next week!
I visited with a MB tech yesterday. We concluded the front "auxiliary" battery was probably in need of replacement since it was original. The main rear battery had been replaced in 2009. Car starts now with the FOB key in the ignition, but door locks do not work with FOB or the exterior black door lock button. GPS & audio on the command screen are working normally.
Will have the front battery analyzed when I get to the dealer...160 miles away...weather permitting next week!
MBWorld Fanatic!
Joined: Jul 2006
Posts: 1,779
Likes: 11
From: Long Island, NY
2004 E320
320 mile roundtrip ! Wouldn't it be more cost effective just to buy a new aux battery, since it's 9 years old and probably not much life left. If you got 18mpg and pd $4.29/gal, it would cost you $76.00 in gas, + dealer labor charge, not to mention the hrs on the road.
I'd go with a Deka AGM @ $76 delivered, ETX14, 1 yr warranty : http://www.bohannonbattery.com/html/deka/etx14.html
I'd go with a Deka AGM @ $76 delivered, ETX14, 1 yr warranty : http://www.bohannonbattery.com/html/deka/etx14.html
Last edited by starbrite; Feb 23, 2013 at 02:15 PM. Reason: added info
Thread Starter
Junior Member
Joined: Feb 2005
Posts: 18
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From: Extreme NE Iowa
2004 E320 4matic
Thank you for the tip and information...
I need to be in the cities anyway, so it will work out...IF the car will run there.
Always receive excellent service, so look forward to the trip...weather permitting...does not sound great!
I need to be in the cities anyway, so it will work out...IF the car will run there.
Always receive excellent service, so look forward to the trip...weather permitting...does not sound great!
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MBWorld Fanatic!
Joined: Jul 2006
Posts: 1,779
Likes: 11
From: Long Island, NY
2004 E320
Originally Posted by ale
Originally Posted by starbrite
So, it's been 2 weeks since your last post. Did you get it diagnosed, and if so, what was the result?
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CLS400
Fixed
My 2015 CLS battery died and caused the keylessgo to stop working. Turns out it was the battery under the hood on its way out. Replaced the battery and fixed it along with several other electrical issues that were intermittent! Pretty excited considering it only cost $160 and 15 minutes
