tjamesbo
Active Member
- Joined
- Jan 6, 2007
- Messages
- 706
- Location
- Sutton Coldfield Midlands
- Car
- CLK430 ,Vito V6 sport ,Jaguar 2.5 X type ,W124's 1993 220TE , 1994 320TE ,Mastercraft X5
Yesterday evening the CLK wouldnt start after a brief charge (1hr ) still no start so checked the battery using my TOPDON battery tester which showed 10.3 volts and a replace diagnostic however However i needed to move the car and therefore opted to use my Ring 3000 Jump start pack to start it and move it . As it was difficult to get a good contact on the terminals in the boot i thought it would be easier to use the typical mercedes posts under the bonnet which are there for jump starting purposes ( or charging if your locked out of the boot )
Theres a positive post but no negative post and an absence of any other earthing bolt points anywhere in proximity and as the jump starter only has short cables designed to go on the battery i was back to the boot battery terminals and it did make me wonder ;
1 is there any difference jump starting from the boot battery or the engine bay post ?
2 could i use the metal bracket for the positive post as an earth as the bracket is bolted to the body (see picture )
3 or should i add a jumper cable to the short ring lead and then the other end to a suitable earth (not good a good idea i think with the current involved )
4 should i depaint a wing bolt next to the positive post and then its easily available for future use (although hopefully with a new battery it wont be required any time soon )
Theres a positive post but no negative post and an absence of any other earthing bolt points anywhere in proximity and as the jump starter only has short cables designed to go on the battery i was back to the boot battery terminals and it did make me wonder ;
1 is there any difference jump starting from the boot battery or the engine bay post ?
2 could i use the metal bracket for the positive post as an earth as the bracket is bolted to the body (see picture )
3 or should i add a jumper cable to the short ring lead and then the other end to a suitable earth (not good a good idea i think with the current involved )
4 should i depaint a wing bolt next to the positive post and then its easily available for future use (although hopefully with a new battery it wont be required any time soon )
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