Retaining Heated Seats
#1
Retaining Heated Seats
Wondering if the 48V battery or accessory system can maintain some heated seat function while car engine not running? Don’t want to drain starter battery but would be nice to keep some seats warm while sitting in car.
#2
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former- 10&14 ML BlueTecs, 20 GLE450 E-ABC, 15 Cayenne D, 17 Macan
As is the heater blower fan, but coolant is circulated through the system via a 48 volt water pump to keep the cockpit warm and windows defrosted. The AC (48v) will also kick in for defrosting.
The starter battery is actually 48 volt as well (ISG) but the car will restart if the batteries get too low.
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Splaktar (01-21-2024)
#3
The 48v system replaces everything that used to be powered by a belt - the AC compressor, supercharger, water pump, power steering pump - If you take a look there's no belt-drive accessories on your engine. Plus it powers the starter motor.
Nothing else - everything else in the car is 12v still, including the heated seats.
48v simply allows the car to use smaller gauge wire and electrical motors.
Nothing else - everything else in the car is 12v still, including the heated seats.
48v simply allows the car to use smaller gauge wire and electrical motors.
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Splaktar (01-21-2024)
#4
Another poster mentioned that the A/C button if activated (it says 'rest' on the switch by the way), when the car is turned off, will allow the heating system to blow the residual heat from the engine. I have used this feature many times while dropping off and waiting for my kids during his practice sessions. The car is off but the heat keeps blowing. Works really well.
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#5
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The 48v system replaces everything that used to be powered by a belt - the AC compressor, supercharger, water pump, power steering pump - If you take a look there's no belt-drive accessories on your engine. Plus it powers the starter motor.
Nothing else - everything else in the car is 12v still, including the heated seats.
48v simply allows the car to use smaller gauge wire and electrical motors.
Nothing else - everything else in the car is 12v still, including the heated seats.
48v simply allows the car to use smaller gauge wire and electrical motors.
Last edited by jkaetz; 01-22-2024 at 10:26 AM.
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Splaktar (01-22-2024)
#6
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former- 10&14 ML BlueTecs, 20 GLE450 E-ABC, 15 Cayenne D, 17 Macan
.
Last edited by mikapen; 01-22-2024 at 07:45 PM.
#7
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former- 10&14 ML BlueTecs, 20 GLE450 E-ABC, 15 Cayenne D, 17 Macan
There's also a 48 volt Supercharger in the 53s.
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MDMercedesGuy (01-23-2024)