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Both key fobs won't unlock or start 08 c350
Thread Starter
Newbie
Joined: Feb 2012
Posts: 10
Likes: 1
From: Bay Area, CA
NOW: 2022 E53, Then:2018 C43 & 2008 C350
Both key fobs won't unlock or start 08 c350
Hey guys,
Can I get a little help please? Both my key fobs won't unlock my c350 so I manually unlocked it using the key and the alarm went off. I'm not able to use the key fob so the alarm just kept on going. I tried starting the car but it didn't work. I tried pressing buttons inside the car like the unlock button, the trunk button, the radio, and nothing of them would work. I don't know if its because the alarm disabled all this. By the way, both keys have the red light working so I know its not the key fob battery. Any help?
Thanks!
Can I get a little help please? Both my key fobs won't unlock my c350 so I manually unlocked it using the key and the alarm went off. I'm not able to use the key fob so the alarm just kept on going. I tried starting the car but it didn't work. I tried pressing buttons inside the car like the unlock button, the trunk button, the radio, and nothing of them would work. I don't know if its because the alarm disabled all this. By the way, both keys have the red light working so I know its not the key fob battery. Any help?
Thanks!
MBWorld Fanatic!
Joined: Dec 2011
Posts: 1,580
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From: San Francisco Bay area
C63 AMG
Might be able to get more help about it on the w204 section because some of them may have had the same issue themselves. Also have you recently gotten a tint? I know a lot of w203s had issues with there keys not unlocking and locking as well after a tint, so that could be a possibility. Anyways good luck!
MBWorld Fanatic!
Joined: Dec 2011
Posts: 1,580
Likes: 0
From: San Francisco Bay area
C63 AMG
To be honest I don't know much about the issue because I never had a tint done on my car. I have seen the issue come up with other people on the forum many times. If you do a search about it plenty of information should come up regarding it.
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Joined: Nov 2007
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From: NYC
2012 C300 4Matic
This sort of problem would have nothing to do with a tint job, even if he had one (which certainly does often result in problems with the antenna!)
If inserting the key in the ignition doesn't work its another problem, because even if the alarm is going off, inserting the key will stop the alarm and start the engine -- even if the key has a dead battery or no battery at all.
I don't have enough information to go on, but the highest probability is that you have a DEAD BATTERY! The alarm will still go off when your battery is dead -- it has its own backup battery.
Test your car battery.
If inserting the key in the ignition doesn't work its another problem, because even if the alarm is going off, inserting the key will stop the alarm and start the engine -- even if the key has a dead battery or no battery at all.
I don't have enough information to go on, but the highest probability is that you have a DEAD BATTERY! The alarm will still go off when your battery is dead -- it has its own backup battery.
Test your car battery.
Last edited by acr2001; Jun 19, 2012 at 10:19 PM.
Thread Starter
Newbie
Joined: Feb 2012
Posts: 10
Likes: 1
From: Bay Area, CA
NOW: 2022 E53, Then:2018 C43 & 2008 C350
So I tried jump starting the car and it didn't work. Luckily for some of us, their road side assistance has free towing and free jump starting. The guy came out and tried jump starting the car. Everything started working but it still wouldn't start. I ended up getting it towed to the dealership and they finally determined that it was a dead battery. I ended up paying just the cost of the battery with free labor thanks to my service advisor. Car is working fine now. You guys were right! Thanks for all the input. I just don't understand why the car still wouldn't start even after jump starting it.
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Jump starting with a totally dead battery will frequently do this. It would have started with the dead battery out of circuit.
