need help with battery issue
Thread Starter
Senior Member
Joined: Mar 2015
Posts: 372
Likes: 3
s550
need help with battery issue
Ok so here is the issue. Lets say I drive my car and get home and use the key fob to lock the car. after the car sits for about 1 hour. If i come back out to use the key fob to unlock the car. the car is completely dead. it wont unlock the car. i have to manually use the key to unlock my car. but i notice as well when i open the doors the lights dont come on. once i stick key in the ignition the car will turn on and start and act normal. it just notice my clock is turning like its reset or something. I have put the front and rear trunk battery on trickle charges to make sure the batteries are not dead. they seem fine. So what is the issue? I cant figure it out. Is there another battery in the dash or something that im not able to get too? thank you in advance.
Super Member
Joined: Feb 2007
Posts: 616
Likes: 302
From: Republic of Texas
W203 W212 W211 R53MCS
It seems as if the main battery voltage is going low. Usually this batteries are good for about 3 to 4 years. Not sure what year your car is, but the main battery is going to be in the trunk area or in the front.
