2010 s550 Parasitic draw?
07-05-2020, 03:43 PM
#1
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S 550
2010 s550 Parasitic draw?
I keep getting a dead battery , so i know i have a parasitic draw , the battery is Dealer new , so that is not the issue , i had a bad rear footwell light bulb that i am about to replace , but doubt this is the issue , it threw a code , 9231 my other code , is 9263 , which is the lumber support it pumps up the lower back , drivers side, It pumps sometimes , i think , but obviously something going on. my Reader says /leaks/open circuit , this S550 is a base base model was purchased with minimal spec no massage seats , just lumber , which in this car i am ok with , could this be the reason of the parasitic draw . or is this just a defective bladder , and i should be using a volt meter to check draw etc hope im making sense , but the battery will die in 4-5 days if i dont keep on a trickle charger. any thoughts
07-08-2020, 11:13 PM
#2
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I have an 08 and the tel aid module was draining my battery. The proper resting amp draw for mine was 20 milliamps when the tele aid module was pluged in the amp draw was about 160 milliamps but must have gone up after a few hours because the battery was dead (5 volts) in 24 hours. You could try unplugging the pse pump if you suspect it to be the problem.
07-09-2020, 12:14 AM
#3
MBWorld Fanatic!
OP when looking for a draw I install a digital amp meter between the battery cable and battery to monitor how much is being lost.
Start pulling fuses one at a time. You will find the circuit that has the draw. Takes time and is often a PITA to deal with.
More often then not a control unit isn't going to sleep. Get to it!
Start pulling fuses one at a time. You will find the circuit that has the draw. Takes time and is often a PITA to deal with.
More often then not a control unit isn't going to sleep. Get to it!
07-09-2020, 12:58 AM
#4
MBWorld Fanatic!
I keep getting a dead battery , so i know i have a parasitic draw , the battery is Dealer new , so that is not the issue , i had a bad rear footwell light bulb that i am about to replace , but doubt this is the issue , it threw a code , 9231 my other code , is 9263 , which is the lumber support it pumps up the lower back , drivers side, It pumps sometimes , i think , but obviously something going on. my Reader says /leaks/open circuit , this S550 is a base base model was purchased with minimal spec no massage seats , just lumber , which in this car i am ok with , could this be the reason of the parasitic draw . or is this just a defective bladder , and i should be using a volt meter to check draw etc hope im making sense , but the battery will die in 4-5 days if i dont keep on a trickle charger. any thoughts
