What should the battery drain be on a Mercedes Benz?
Get an inexpensive multi-meter and check the battery current drain after the car has been off for say 30 minutes. Should be around 50 milliamps. You can also check charging voltage with the engine running and accessories on. Should be between 13 and 14 volts.
Why does my battery drain after 5 mins?
Say open circuit is 12.6v. Connect the battery to the car and measure after 5 mins, if there is no drain, then it may read 12.58 or around that. If there is drain, it will depend on the load but may read 12.4 or less. Since you have identified hot relays, then the relay maybe stuck or the computer / sensor that controls the relay is faulty.
Is there a battery leak in a Mercedes medic?
Check for any leakage if you have older lead acid battery. Absorbed Glass Mat (AGM) batteries are sealed and you don’t need to worry about leakage. AGM type batteries is what newer Mercedes-Benz cars use. Voltage Regulator may be defective and needs replacement. Test the alternator. Make sure it is generating enough amperage.
What should I do if my car battery is draining?
Remove the key from the ignition and let the car sit for at least 15 minutes. In some models you may need to wait up to 30 minutes for all the electronic systems to go “to sleep”. This will allow the car to shut off any electronic consumers that stay on for a brief period after the car is parked.
Why does my Mercedes-Benz battery keep draining?
You try to start your Mercedes-Benz and the car is either completely dead or this happens: Battery drains happen when electronic equipment (consumer units) are constantly drawing current from the battery while the car is parked. One simple example is when lights are left on overnight. But it’s not always as simple as that.
Check for any leakage if you have older lead acid battery. Absorbed Glass Mat (AGM) batteries are sealed and you don’t need to worry about leakage. AGM type batteries is what newer Mercedes-Benz cars use. Voltage Regulator may be defective and needs replacement. Test the alternator. Make sure it is generating enough amperage.
How long does it take for car battery to drain?
Usually takes a week to completely drain if i dont use the car My drive to work each day is only about five minutes, was thinking that may have something to do with it.
How did I find out my battery was draining?
The drain was found by going to each fuse dock and testing the energy draw readings with a meter to see if any system was drawing power when it should not be doing so as the car was off. The amp, an issue MB has had problems with a lot, was drawing power when the radio/car were off and slowly over the course of a few days was draining my battery.