2008 CLK 350 Key fob drain

[Blotty]

Hello,

Was wondering if anyone experienced this problem and has a solution.

I have a 2008 CLK 350. The batteries in my key fob keep dying after about 1-2 weeks causing the RF portion of the FOB to stop working.

When I replace them, I am able to lock / unlock the doors and open the trunk via the FOB, but only after depressing the alarm button once.

The alarm has also been randomly going off when I exit the car. Sometimes the only way I can get it to stop is by inserting the key in the ignition.

Ive pulled the circuit board out of the key fob visually inspected it under a microscope. All the solder joints look good.

Any help would be greatly appreciated!

 

[sjmaxwell]

I'm guessing that you are US based so welcome!

I dont have a definitive answer but it may be worth having the car battery checked as this can cause strange electrical issues such as the alarm going off but I dont know if this would affect the batteries in the remote. Does the second remote have the same issue?