Heater issues?
Thread Starter
Newbie
Joined: Aug 2022
Posts: 12
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EQS 580
Heater issues?
Hi,
My 2022 EQS sedan is having strange heater issues. In colder outside temperature (5c and colder) the vents on the top side of the dash does not blow hot air, no matter the asking temperature. Other areas, such as middle and below is blowing the right temperature and reacting to changing the temperature. This usually comes in a longer drive, and I've tried pretty much every setting. Really annoying as inside the car you feel a cold draft when normally you should feel even heat distribution.
The dealer has once tried to fix the problem, basically just updating the software, and as now we are having colder temperatures, the issue is back again.
Anyone else having similar problems?
My 2022 EQS sedan is having strange heater issues. In colder outside temperature (5c and colder) the vents on the top side of the dash does not blow hot air, no matter the asking temperature. Other areas, such as middle and below is blowing the right temperature and reacting to changing the temperature. This usually comes in a longer drive, and I've tried pretty much every setting. Really annoying as inside the car you feel a cold draft when normally you should feel even heat distribution.
The dealer has once tried to fix the problem, basically just updating the software, and as now we are having colder temperatures, the issue is back again.
Anyone else having similar problems?
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Joined: Apr 2023
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From: Occupied Palestine
2025 Maserati Grecale Folgore and 2024 Jaguar F-PACE SVR
Good news is with the new "heat" pump that moderately warm air will use much less energy. Bad news is it's still not really a heater. They should call it a cabin warmer.
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From: WI
17 E43; 21 GLS580
The heater on the EQS can blow as warm and frim wherever you want....at the cost of range. Simply take it out of auto and choose. In winter at sub zero temperatures and in reduced AC mode, it can maintain a temp of 65 degrees with minimal impact on range. If you feel alittle chill the butt warmers are can take care if that too. You can of course warm it to whatever you wish as long as you know it will suck up your battery. Again, the "heatpump" is kind of an urban legend, The EQS in effect has always had a "heat pump" since it has an oil and waste heat recirculation system. If you like a toasty cabin simply leave the car plugged in and set a time for departure thus avoiding the biggest draw of current to begin with. I have a heated garage which I keep at 56 degrees in winter again which avoids the the preheating issue. Teslas and other solid battery cars benefit most from so called heat pumps since they have very steep range loses in cold temperatures (40% plus), MBs battery systems lose from 25 to 30%. The same thing goes with parasitic losses. Teslas lose up to 5% just sitting in the garage, particularly in hot weather. MB's packs lose 1% or less. Tesla invested billions in battery gigafactories that use steel battery cells, that technology has a slew of drawbacks compared to more modern flat (pouch) battery packs..
Member
Joined: Aug 2023
Posts: 84
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eqs 580 suv
The heater on the EQS can blow as warm and frim wherever you want....at the cost of range. Simply take it out of auto and choose. In winter at sub zero temperatures and in reduced AC mode, it can maintain a temp of 65 degrees with minimal impact on range. If you feel alittle chill the butt warmers are can take care if that too. You can of course warm it to whatever you wish as long as you know it will suck up your battery. Again, the "heatpump" is kind of an urban legend, The EQS in effect has always had a "heat pump" since it has an oil and waste heat recirculation system. If you like a toasty cabin simply leave the car plugged in and set a time for departure thus avoiding the biggest draw of current to begin with. I have a heated garage which I keep at 56 degrees in winter again which avoids the the preheating issue. Teslas and other solid battery cars benefit most from so called heat pumps since they have very steep range loses in cold temperatures (40% plus), MBs battery systems lose from 25 to 30%. The same thing goes with parasitic losses. Teslas lose up to 5% just sitting in the garage, particularly in hot weather. MB's packs lose 1% or less. Tesla invested billions in battery gigafactories that use steel battery cells, that technology has a slew of drawbacks compared to more modern flat (pouch) battery packs..
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223.168 & 213.012 & 906.633 & 214.005
Depends on the definition of a heat pump. I believe C4004matic is referring to the early MB sales bluff (my interpretation of a heat pump). The earlier EQ models were only able to use waste heat from different parts of the car but I would not call that a heat pump. Heat pump works on a car parked outside in frost like a heat pump works in a house at winter. There is no waste heat to use in either case but still the wattage used for heating is many times lower than the wattage of heat produced, that is a heat pump and in practise it always works with the compressor just like HVAC on all cars works for cooling the car.
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From: Occupied Palestine
2025 Maserati Grecale Folgore and 2024 Jaguar F-PACE SVR
OK, well there's your answer: the heater sux but its not an issue so don't expect anything to change or get better. You might even want to prepare yourself for the non-issue to become worse.
2025 MY non-Teslas, with Tesla connectors, can't come out fast enough for me! My EQE SUV will get traded so fast it'll make the sales guy's head spin.
2025 MY non-Teslas, with Tesla connectors, can't come out fast enough for me! My EQE SUV will get traded so fast it'll make the sales guy's head spin.
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Newbie
Joined: Jan 2024
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From: ZRH
EQS 450+
Hi there small Monkey
My EQS is also not heating. There is cold air coming from the horizontal vents in the front.
I randomly called a tuning garage, because I supposed that real car people talk about cars, all in general.
They told me that "heating ventil gets stuck" .
MB service ordered a bunch of replacement pieces for Heating just to try it out.
My EQS will go for repair works next week on the 24.01 - I will keep you posted.
Best regards,
Valentina
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MBWorld Fanatic!
Joined: Feb 2014
Posts: 1,938
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From: Iowa
2025 EQS580
Hi,
My 2022 EQS sedan is having strange heater issues. In colder outside temperature (5c and colder) the vents on the top side of the dash does not blow hot air, no matter the asking temperature. Other areas, such as middle and below is blowing the right temperature and reacting to changing the temperature. This usually comes in a longer drive, and I've tried pretty much every setting. Really annoying as inside the car you feel a cold draft when normally you should feel even heat distribution.
The dealer has once tried to fix the problem, basically just updating the software, and as now we are having colder temperatures, the issue is back again.
Anyone else having similar problems?
My 2022 EQS sedan is having strange heater issues. In colder outside temperature (5c and colder) the vents on the top side of the dash does not blow hot air, no matter the asking temperature. Other areas, such as middle and below is blowing the right temperature and reacting to changing the temperature. This usually comes in a longer drive, and I've tried pretty much every setting. Really annoying as inside the car you feel a cold draft when normally you should feel even heat distribution.
The dealer has once tried to fix the problem, basically just updating the software, and as now we are having colder temperatures, the issue is back again.
Anyone else having similar problems?
MBWorld Fanatic!
Joined: Oct 2002
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From: Cincinnati
2010 E350 4Matic
MBWorld Fanatic!
Joined: Apr 2023
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From: Occupied Palestine
2025 Maserati Grecale Folgore and 2024 Jaguar F-PACE SVR
Heater sucks down juice like crazy even with the heat pump but seats and steering wheel quickly become nice and toasty and I don't feel like I'm abusing the vehicle by just jumping in and taking off. The Jag would have barely warmed up for the 5 - 10 mile trips I typically take in bad weather. Plus I plugged in for free at a Target ChargePoint and actually arrived back home with 2% more than when I left despite my horrible mi/kwh. 
Super Member
Joined: Jan 2022
Posts: 981
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I seem to remember heating working when I first got my 450+ last Winter, but it is clearly not working now. Not a huge problem in Texas, I am usually wearing several layers when I drive to the golf course early in the mornings. However, there is clearly no heat capability now, even when the temp is turned up to HIGH, except for the heated seats. Tried turning on the Max defrost.....that works minimally. Let me know what your dealer found, please.
Super Member
Joined: Jan 2022
Posts: 981
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Really weird. After several mornings where the heater clearly was not working at all, this morning it worked like a champ, quickly warming the cabin to the 72 degrees I had it set on. I had tried playing with all the settings, turning ECO and ECO+ on and off, .I never use them, and then returning it to comfort mode. Don't know it that made a difference or not, but it worked today. Gremlins! Anyone have any other ideas?
MBWorld Fanatic!
Joined: Feb 2014
Posts: 1,938
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From: Iowa
2025 EQS580
Really weird. After several mornings where the heater clearly was not working at all, this morning it worked like a champ, quickly warming the cabin to the 72 degrees I had it set on. I had tried playing with all the settings, turning ECO and ECO+ on and off, .I never use them, and then returning it to comfort mode. Don't know it that made a difference or not, but it worked today. Gremlins! Anyone have any other ideas?
I’m going to bring it in to the dealer and leave it there for a day or two and let the lead mechanic work on it and see what he can find/do.
Super Member
Joined: Jan 2022
Posts: 981
Likes: 555
Sorry about your issues with the heater. I tried turning on the defrost, as you suggested, but that didn't change my situatiuon. I am still on E319, never had anything but the recall updates, because I was worried about all the issues everyone was having with the newer versions, so that is not the cause. It worked great yesterday, out of the blue. I'll let you know after I drive to the golf course this morning, but my fingers are crossed. If your dealer finds a solution, please share it with us, and I can take that info to my guys. thanks.
Thread Starter
Newbie
Joined: Aug 2022
Posts: 12
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EQS 580
I had my EQS checked and there were no fault codes. The service did, however, reconfigure the aircon/ventilation - which seems to have helped. The service told there have been a considerable amount of issues in the heating and the manufacturing is working on a software update. Not sure how true this is, and if it is, when we could expect for an update.
Also, for me, playing with settings; comfort/eco/eco+, direct air to windscreen etc., has helped. It seems sometimes the aircon/ventilation gets "confused" so playing with settings might help.
Also, for me, playing with settings; comfort/eco/eco+, direct air to windscreen etc., has helped. It seems sometimes the aircon/ventilation gets "confused" so playing with settings might help.
Junior Member
Joined: Jan 2020
Posts: 20
Likes: 6
C63S
On my EQE 350+, the air conditioning has been failing every few days since December (after the E445.0001 update?) and cannot be switched on again, here are 2 videos to demonstrate thie issue:
Then I also have the problem that the air conditioning suddenly stops heating while driving. You really notice how the air gets colder and colder, even with the temperature set to high and the ventilation at maximum, nothing happens anymore, if I set the temperature to low then suddenly the ventilation turn up:
