E-Class (W211) 2003-2009

Reduced brake power start engine!

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Old Mar 15, 2021 | 02:40 AM
  #1  
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2005
Reduced brake power start engine!

Hey ,, I saw many threads about this bust still don't have answer.
my car is 2005 w211 e 320
every week especially when the car is idle for a whole day I get a message "reduced brake power start engine !"when turning the ignition on .. it goes away after a minute .
Last month I replaced the sbc unit ,and brake part under the steering .
I checked the problem with diagnostics and doesn't show any problem .
Before two weeks I replaced the esp module(still get the message).
Please help !
Thanks


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Old Mar 15, 2021 | 05:32 PM
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ot1
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2006 E320 CDI
Get a voltmeter and read the auxiliary battery before you start the car in the morning. The best deal for that battery is from FCP Euro, its OEM. I checked last month and it was $100.
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Old Mar 15, 2021 | 05:41 PM
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Originally Posted by ot1
Get a voltmeter and read the auxiliary battery before you start the car in the morning. The best deal for that battery is from FCP Euro, its OEM. I checked last month and it was $100.
thanks for the reply ..
I checked the the main battery and the auxillary on the mb star diagnostics and showed no problem .
Still I need to check manually?
Thanks
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Old Mar 16, 2021 | 02:01 AM
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2006 E320 CDI
Originally Posted by Moanes
thanks for the reply ..
I checked the the main battery and the auxillary on the mb star diagnostics and showed no problem .
Still I need to check manually?
Thanks
who is the manufacturer and what is date of your auxiliary battery.
and read the voltage, with a volt meter, before you start your car in the morning.... Still
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Old Mar 16, 2021 | 02:03 AM
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Originally Posted by ot1
who is the manufacturer and what is date of your auxiliary battery.
and read the voltage, with a volt meter, before you start your car in the morning.... Still
It is a bad replacement .. chinese I think .
I will check the voltage
Thanks
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Old Apr 8, 2021 | 01:47 PM
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Originally Posted by ot1
who is the manufacturer and what is date of your auxiliary battery.
and read the voltage, with a volt meter, before you start your car in the morning.... Still
Thanks .. I replaced the auxillary battery ,, I got bosch .
Everything is good now for almost 3 weeks .
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