SL/R230: Jump start/electrics problem
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
There is one thing that is a bit odd to me. The owner's manual says to make the final connection between the batteries after the donor car's engine has been started. I would think voltage spikes would be less if all connections were made with the engine off. I googled articles on jump-starting, and all of them state to complete the battery connections before starting either engine. I can only surmise that it really doesn't matter either way...
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
That's good to know, Rodney. Your record of success is extremely compelling.
There is one thing that is a bit odd to me. The owner's manual says to make the final connection between the batteries after the donor car's engine has been started. I would think voltage spikes would be less if all connections were made with the engine off. I googled articles on jump-starting, and all of them state to complete the battery connections before starting either engine. I can only surmise that it really doesn't matter either way...
There is one thing that is a bit odd to me. The owner's manual says to make the final connection between the batteries after the donor car's engine has been started. I would think voltage spikes would be less if all connections were made with the engine off. I googled articles on jump-starting, and all of them state to complete the battery connections before starting either engine. I can only surmise that it really doesn't matter either way...
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
The M-B training document states that the starter battery powers the starter motor armature and nothing else, but that is not true. The starter battery can also power the N82 vehicle power module. Therefore, in the case where both batteries are weak jumping from the starter battery can start the car.
