Key issue Battery Drain - car goes dead CLK
Thread Starter
Newbie
Joined: Nov 2014
Posts: 2
Likes: 0
CLK 320
Key issue Battery Drain - car goes dead CLK
Hi All - have been having this issue for a while now in my 05 CLK
The battery seems absolutely perfect. But at times when the car is off and I try to turn on the car, i put the key inside and the whole system goes dead. There is zero power in the car. I wont be able to turn the key too. I will have to jump start the car and the whole system is reset.
Got it checked and was informed it was a faulty EIS which was causing the battery to "drain". I even got that changed. It was fine for a while but the problem came back again. I put my key in, till then there was power and when I tried turning it to start the car the car just went dead with no power. Can some one please explain me whats happening?
The battery seems absolutely perfect. But at times when the car is off and I try to turn on the car, i put the key inside and the whole system goes dead. There is zero power in the car. I wont be able to turn the key too. I will have to jump start the car and the whole system is reset.
Got it checked and was informed it was a faulty EIS which was causing the battery to "drain". I even got that changed. It was fine for a while but the problem came back again. I put my key in, till then there was power and when I tried turning it to start the car the car just went dead with no power. Can some one please explain me whats happening?
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The most common cause of this problem is parasitic draw. The seat modules and/or the HVAC sniffer fan in the onerhead console not going to sleep.
Thread Starter
Newbie
Joined: Nov 2014
Posts: 2
Likes: 0
CLK 320
Thanks Glyn for your reply. I had it checked for a parasitic draw as well. They were not able to find any drain except for the drain from the EIS module which i replaced later. Could it be the anti-theft module ? my car once stalled while driving and the system went dead. this happened a year ago. after that it hasnt stalled so far thankfully !
Newbie
Joined: Dec 2014
Posts: 2
Likes: 0
2005 CLK500
Thanks Glyn for your reply. I had it checked for a parasitic draw as well. They were not able to find any drain except for the drain from the EIS module which i replaced later. Could it be the anti-theft module ? my car once stalled while driving and the system went dead. this happened a year ago. after that it hasnt stalled so far thankfully !
