Question about Mercedes-Benz ML350
Modern luxury cars have very complex computers that require a certain amount of energy to maintain the memory. At autoparts stores they use a device called a memory minder when changing batteries. it is a 9 volt that keeps the computer from resetting when the battery disconnects. I had a friend with a bmw 7 series and he disconnected the battery without a memory minder and the car wouldnt work right. idling low no idrive navigation system, no acceleration, etc. many car computers will relearn the necessary lost data after being started and turned off a few times 4 to 6. I have done this for many cars and it had worked on newer fords, jaguars, bmws, and others.
Posted on Mar 31, 2014
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Posted on Jan 02, 2017
The factory security light will remain on - this is a standard feature indicating the car is dead.
First, unplug the hazard fuze in the engine bay (this will reset the ecu and remove the flashing)
Next, replace the battery with a new one (or one with proper charge) - keep in mind a small battery will not do anything for these cars, the engines require a lot to push them over (it isnt a honda)
*Make sure to clean the positive and negative battery cables from acid
Then just start it up :)
Posted on Apr 06, 2009
disable or remove the alarm and see if problem gone especially ifits an aftermarket fitment alarm system.sounds like this job is one for an auto elec.
have had central door lock modules cause this
Posted on May 31, 2009
the battery says 12 volts but may be dropping to 4 or 5 under a load...i would suggest jumpstarting the car and see what happens.the battery should read in the high 12 volts and not less than 9.5 under cranking. the dash lights go out on your car when starting,and the alarm will go off ,and disable the ignition if the voltage is too low in cranking the car because the computer will shut it down and activate the anti theft.....check your battery posts are tight. best of luck
Posted on Jul 22, 2009
SOURCE: Have a 2003 Dodge Neon SXT
sounds like the car is running off the battery due to a bad alternator,the battery is just for the car to start,not to keep it running,replace the alternator and charge the battery and your problem should be solved,hope this helped
Posted on Sep 23, 2009
Testimonial: "Thanks very much I changed it and worked but now I have to change the battery because is not charging. Thanks again."
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