Date registered: Dec 2005
Vehicle: 222.132 & 221.122 & 213.050 & 906.633
Mentioned: 3 Post(s)
Quoted: 40 Post(s)
You can kill SAM units and others if you do not connect/disconnect jump leads properly. MB isn't out of business because of this, on the contrary they are selling a good deal of new SAMs.
Why don't you use a charger, it is slower but would have safely done the job by now.
If you decide to jump-start the car, have both cars switched off first before connecting cables. And triple check that polarity is correct, and then check again.
Once cables are connected, start the supplying car for a while. It would be safest to stop both cars before taking leads out but if the receiving car might not start again, at least stop the supplying car first to avoid a voltage surge.