C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Jump starting / flat battery(?) on C320 CDI

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Old Feb 27, 2022 | 07:36 PM
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C320 CDI (2008)
Jump starting / flat battery(?) on C320 CDI

Hi all, first post on this forum, figure it will come in useful if/when more issues appear on my car (C320 CDI, Elegance - 2008).

I tried starting my car recently and was greeted two two-three cranks then a hard-shut off. All interior electronics are still working, I suspect it's a flat battery due to leaving my park lights on

I'm going to attempt a jump-start by using a battery jumper-pack but am a little confused, there is only a single, large battery under the boot liner, but there are polarity terminals under the bonnet (I've checked under the air-box, definitely no accessory battery). My questions are as follows:
  • Should I jump the car to the terminals under the bonnet or directly to the battery?
  • Are there any major risks in jump-starting the car?
  • Am I better off jumping the car with the battery of another vehicle?
  • I assume the diesel engines require higher amperage to start, Does anyone with experience in starting a similar-sized engine (3.5L Diesel) have recommendations for jump starters?
Apologies for my lack of knowledge, any responses/help would be greatly appreciated!
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Old Feb 28, 2022 | 03:14 AM
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2003 E500, 2010 C300
Use the terminals under the bonnet, don’t jump from the battery.
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