Mercedes-Benz Forum banner
1 - 9 of 9 Posts

·
Registered
2005 E320
Joined
·
12 Posts
Discussion Starter · #1 · (Edited)
What is the difference between the 12v socket at the rear and the cigarette lighter at the front? I understand that one can plug a cooler box for instance, into the 12v socket. Can I however, plug my portable GPS' charger into the 12v socket at the back, or MUST I use the cigarette lighter's socket?
Thanks so long.
2004 E320
 

·
Registered
1985 300CD Turbo coupe, 2006 E320 CDI sedan
Joined
·
573 Posts
Mine is marked "do not exceed 150 watts". So I plug a 150w inverter into the trunk receptacle. That way I have DC power from the cigar lighter receptacle, and AC power in the trunk

//greg//
 

·
Registered
1985 300CD Turbo coupe, 2006 E320 CDI sedan
Joined
·
573 Posts
AFAIK, diesel w211 12v outlet are all 15A. no idea on the gasser version.
Can't see where the engine has anything to do with electrical distribution. Diesel, petrol, it's still a 12v system. But if you saw 15A somewhere, I'm thinkin' that must be a surge rating. Cuz mine's clearly labeled as a 150w outlet (that's a nominal 12.5 amps DC).

//greg//
 

·
Registered
1985 300CD Turbo coupe, 2006 E320 CDI sedan
Joined
·
573 Posts
Mine said "Max 15A" on the rear socket. Going by the 85% rule, it is about 12.75A.
Is this "85% rule" a Canadian thing? Cuz I'm a retired EE tech who still goes by Ohm's Law. But even accepting this 85% rule, your "15A Max" label, almost certainly indicates the surge limit. As I said, mine is labeled "150 watts". Given a 12 volt supply, Ohm's Law still makes that nominal 12.5 amp outlet.

I don't really see any need to bicker over a quarter amp. I'm only clarifying so folks don't read this - and arbitrarily plug in anything that says 15A on the label. I'm still considering it a "15Amp surge" rating.

//greg//
 

·
Registered
2005 CLK320, 2009 E350
Joined
·
358 Posts
Any issues with tapping off the rear adaptor for 12v to power a small backup camera?

My biggest thing I want to know is does the outlet shut off after the ignition is off? I don't think I'd want the camera on ALL the time even though it only uses up 70mA... which isn't a lot but I'd just prefer it to be off when the car is off.

Thanks,
-Nigel
 
1 - 9 of 9 Posts
Top