Date registered: Apr 2008
Vehicle: W219 320CDI -07 W220 320CDI -01 W210 270CDI -01 EX: W211 320CDI -04
Mentioned: 9 Post(s)
Quoted: 109 Post(s)
jump start cables and spare battery parellel... but ALWAYS wait a while after connect another battery parallel to system, IF either of them is drained, big balancing current is running in cables which means great possibility to 'welding arc' or at least some harmful sparks when connecting cables... (sorry Dave didn't read you thread if you already mentioned it)
honestly I used to use double battery with my W211 but it was pretty ackward playing with cables and two heavy batteries in trunnk, so I went back to conventional way... only if I owned W203 I would use doubles, I never heard any other car so sensitive to voltage spikes...
edit: as a battery I use Varta and Varta only
-Do not try this at home -
Last edited by mersum1es; 02-09-2019 at 09:02 AM.