Heated door mirrors
Thread Starter
Junior Member
Joined: Dec 2024
Posts: 18
Likes: 4
Heated door mirrors
With this current weather in the UK I thought a great time to test the heated door mirrors.
However ive noticed that the drivers mirror seems to be on all the time and passenger side is off, with nothing else on. There is nothing in the handbook, but on line it says heated mirrors come on when heated rear screen on, but my heated rear screen is off.
So when I switch on heated screen the passenger side still does not come on.
So have Mercedes changed it so that in normal weather mirrors are on and help clear any rain droplets, or when temperature drops they come on automatically?
Either way my passenger mirror does not come on so I could have a faulty heater element which I need to test.
However ive noticed that the drivers mirror seems to be on all the time and passenger side is off, with nothing else on. There is nothing in the handbook, but on line it says heated mirrors come on when heated rear screen on, but my heated rear screen is off.
So when I switch on heated screen the passenger side still does not come on.
So have Mercedes changed it so that in normal weather mirrors are on and help clear any rain droplets, or when temperature drops they come on automatically?
Either way my passenger mirror does not come on so I could have a faulty heater element which I need to test.
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,349
Likes: 694
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
Some have found that they have no passenger side heating element in their GLB. They may vary from region to region. I Where I live in SE Texas, I seldom experience condensation or frost on my door mirrors, so I have no direct experience.
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,349
Likes: 694
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,349
Likes: 694
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
It sounds that your passenger side mirror heat may be faulty or missing. Maybe you could turn on the rear window (backlight) heater and see if the passenger mirror heats with it.
Trending Topics
Thread Starter
Junior Member
Joined: Dec 2024
Posts: 18
Likes: 4
The drivers side heated mirror is on all the time and is not reliant on the heated rear screen. Passenger mirror element has a resistance of 75ohms which I think is too high. I will replace and report back.
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
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
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,349
Likes: 694
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
I don’t know the exact resistance for the mirrors, but I also think 75 ohms is too high. That would make the heater 3 Watts or less. I’m guessing but maybe 15 Watts is a reasonable estimate for the heater. That would be about 12 ohms resistance.
Thread Starter
Junior Member
Joined: Dec 2024
Posts: 18
Likes: 4
New mirror arrived and resistance is 11.5 ohms so i think thats the problem.
