DIY W212 - Constant 12v supply
DIY W212 - Constant 12v supply
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Looks like humongous amount of work.
Why didn't you rewire the fuse on existing supply?
W211 had lighter plug fuse with 2 options to insert, so you could have it on constant supply as well.
Did MB deleted the option in W212 ?
Why didn't you rewire the fuse on existing supply?
W211 had lighter plug fuse with 2 options to insert, so you could have it on constant supply as well.
Did MB deleted the option in W212 ?
MBWorld Fanatic!
Joined: Apr 2006
Posts: 4,694
Likes: 1,829
From: Dallas-Ft.Worth,TX
2016 E350 Sport
Also, the owner's manual says the Comand Manual has info on the 115V outlet, as well. I can't find this, either. I bought a power inverter to keep in the car for when needed. Did I not need to do so? Where is the 115V outlet? And what plugs into it?
Thread Starter
Member
Joined: Oct 2018
Posts: 143
Likes: 33
From: Arctic Circle
W124 W212
Not really that’s much work, most time took it to repair drain thing and video all thing. Like to charge phone with car not on, and don’t like the cable to hang in the console!
MBWorld Fanatic!
Joined: Apr 2006
Posts: 4,694
Likes: 1,829
From: Dallas-Ft.Worth,TX
2016 E350 Sport
So I don't leave anyting attached when my car engine is off.
Given the long periods of cold weather at your extreme latitude, unless you have a heated garage, I would be reluctant to let anything draw current with the engine off.
Last edited by DFWdude; Apr 8, 2020 at 01:38 PM.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Your post has me tearing through my w212 owner's manuals looking for the procedure to switch the Cig Lighter to constant supply. I can't find it. Maybe someone else knows about this?
Also, the owner's manual says the Comand Manual has info on the 115V outlet, as well. I can't find this, either. I bought a power inverter to keep in the car for when needed. Did I not need to do so? Where is the 115V outlet? And what plugs into it?
Also, the owner's manual says the Comand Manual has info on the 115V outlet, as well. I can't find this, either. I bought a power inverter to keep in the car for when needed. Did I not need to do so? Where is the 115V outlet? And what plugs into it?
If you have the option, the adapter will be in rear ashtray compartment. Don't think it was popular option though.
Considering that 100W inverters sell for $20, giving a choice of $300 option, I think I would decline. I have inverter in my Ford truck, who is used as an RV with camper on it, and in 3 years I actually used it like 2 times.
I am too lazy to go to my car now, but W211 lighter fuse has 3 prongs. When you put the fuse on 1 side - it is ignition controlled, when other side makes it constant supply.
Last edited by kajtek1; Apr 8, 2020 at 01:53 PM.
Thread Starter
Member
Joined: Oct 2018
Posts: 143
Likes: 33
From: Arctic Circle
W124 W212
These cars develop any number of parasitic drains that are so difficult to trace. My old C-Class no longer has power seats, because both seat modules were disconnected {at separate times} due to parasitic drains that killed the battery.
So I don't leave anyting attached when my car engine is off.
Given the long periods of cold weather at your extreme latitude, unless you have a heated garage, I would be reluctant to let anything draw current with the engine off.
So I don't leave anyting attached when my car engine is off.
Given the long periods of cold weather at your extreme latitude, unless you have a heated garage, I would be reluctant to let anything draw current with the engine off.
got heated garaget right now, only electric motor heater. Going to do buy a multimeter and se if it drain power.
Trending Topics
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,141
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Your post has me tearing through my w212 owner's manuals looking for the procedure to switch the Cig Lighter to constant supply. I can't find it. Maybe someone else knows about this?
Also, the owner's manual says the Comand Manual has info on the 115V outlet, as well. I can't find this, either. I bought a power inverter to keep in the car for when needed. Did I not need to do so? Where is the 115V outlet? And what plugs into it?
Also, the owner's manual says the Comand Manual has info on the 115V outlet, as well. I can't find this, either. I bought a power inverter to keep in the car for when needed. Did I not need to do so? Where is the 115V outlet? And what plugs into it?
You can plug any 115V device in it as long as it does not pull too much power to blow the fuse. I don't remember what power rating it had but it was fine for computer that I connected to it sometimes.
Last edited by Arrie; Apr 8, 2020 at 11:29 PM.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
