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If you want to be a little safer, turn off the engine on the jumper car before connecting the jumper cables. Use the jumper car's battery by itself (no engine running) to start your car. That way you don't have the over charging voltage surging into your dead system with the potential of frying something.
The attached scan is from the 2007 ML Owner's Manual. Later on in the instructions, it does say to start the engine of the donor vehicle and have it running at idle; but only after connecting the positive terminals only. The negative cable is attached after the donor engine is idling.
Personally, if I were afraid of frying something, I'd use the donor's battery without the engine running.
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1973 280SE 4.5 (Sold)
1984 LWB 280GE (Sold)
2000 G500 NMLE - "Deep Throat"
2007 ML320 CDI (Sold)
2010 Porsche Cayenne S Transsyberia TipTronic (Sold)
2010 Audi Q7 3.0 TDI (Sold and Sorely Missed)
2014 ML350 BTC
2015 Audi Q7 3.0 TDI (On Order)
Last edited by DUTCH; 10-13-2008 at 07:20 PM.
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