2014Merc350SL
New Member
Hi. Can anyone tell me where my Auxiliary Battery is on my SL 350 2014 (UK) model please? Col.
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Thanks aginMost modern cars are negative earth so the wire from the negative post would go to the chassis. To charge simply put the battery charger positive on the battery positive post and the negative from charger either on the negative post or straight to the chassis, job done.
Aren’t there charging posts under the bonnet? In my car and I’ve been using them for 5 years (17,000 miles) without an issues keeping both charged. The car stands for long periods on the charger not being used. Pretty sure your car is the same. MAKE SURE YOU CHECK YOUR BATTERY TYPE _ PROBABLY AGM AND YOUR CHARGER SHOULD BE SET TO AGM MODE IF IT IS.Thx - I am retired gas fitter ...I meant negative but old habits. Its the auxiliary I need to charge not the car main battery. This looks like it has a positive and a wire straight to the car body
I find it easier to open the bonnet and connect to the posts provided for the purpose rather than :There should be battery posts under the bonnet as mentioned in post#6 which can be used successfully to charge the main battery. I've found it easier to go direct to the battery in the boot but your circumstances may be different to mine.
............... My eco light is also always green after charging straight to the battery. .........
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