Battery Charging
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Newbie
Joined: May 2018
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C220 CDI Estate
Battery Charging
Hello -- Newcomer to all things Mercedes. Can I use the two jump start points to charge the battery without having to disconnect the battery itself? Sorry if this is an age old question that's been asked and answered a million times before. Thanks.
Junior Member
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2008 C300
Battery charging
A Mercedes rep in Huntsville, Al told me that it is not necessary to disconnect the battery to charge it.
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From: New Zealand
W204 C200, BMW E30 M3, 1980Gt Mini, Toyota Corona, KTM 200 EXC.
Hi, My advise is buy a Ctek battery charger after using several other brands I found then best by a long shot and the extra long accessory power lead just makes life easy.
Just open the hood connect it up with out disconnecting the battery.
Just open the hood connect it up with out disconnecting the battery.
Last edited by NZ-Merc; May 8, 2018 at 05:41 AM.
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From: Earth
2015 C300 4Matic Sport
I use it all the time in winter, with no problems.
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Senior Member
Joined: Feb 2015
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From: New Zealand
W204 C200, BMW E30 M3, 1980Gt Mini, Toyota Corona, KTM 200 EXC.
Just some info may be handy, I chose the Ctek MXS5 with the accessory 2.5 meter extension lead and also the cigarette lighter connector as well as the normal connectors supplied with the carger.
I have 4 cars with various difficulties of connection the charger and 3 different types of batteries in the cars.
My normal cheap non brand 7 stage “smart" battery charger was not fully charging the 2016 A180 so the stop start was not working correctly which the dealer identified as the battery was not fully charger even though the charger had got through the 7 stages of charging and indicated fully charged.
That is what led me to the Ctek brand after doing lots of research.
The extra extension cord works well for my 1987 BMW M3 I put the cord through the drivers window and plug it in to the cigarette lighter socket as it is live all the time, the battery in the boot is a PIA to access the terminals so the cigarette lighter is best for me option.
I have 4 cars with various difficulties of connection the charger and 3 different types of batteries in the cars.
My normal cheap non brand 7 stage “smart" battery charger was not fully charging the 2016 A180 so the stop start was not working correctly which the dealer identified as the battery was not fully charger even though the charger had got through the 7 stages of charging and indicated fully charged.
That is what led me to the Ctek brand after doing lots of research.
The extra extension cord works well for my 1987 BMW M3 I put the cord through the drivers window and plug it in to the cigarette lighter socket as it is live all the time, the battery in the boot is a PIA to access the terminals so the cigarette lighter is best for me option.
Last edited by NZ-Merc; May 12, 2018 at 03:20 AM.
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2015 C300 4Matic Sport
Also, there is no "AGM MODE." You can see in that diagram both normal and cold weather modes charge AGM.
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2010 C200 CGI
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2015 C300 4Matic Sport
However, he is saying do not use AGM and RECOND options IF the battery is still connected to the car.
The CTEK MXS 5.0 voltages can go as high as 15.8v in your AGM and RECOND options, which is bad for electronics.(look at your voltage chart)
If you disconnect the battery (from the car) you should be free to use any mode you want on your AGM battery.
From the Mercedes manual:
Never, Never press recond option while the battery is still connected to the car.
