My car is still great, at 85k miles, but if I don't drive it for 1-4 days the battery drains and it won't start. One shop says they traced a draw to the #11 circuit that has the power seats and interior lights. but it stopped drawing and they had done nothing to fix it. I have it at the dealer now for timing belt and they tested for a battery draw and saw nothing, ugh.
I suspect the driver power seat/memory. I had set both memories to move the seat back when I get in, this has been set that way for years. and It seems like a few time it does not go back to position after I have p[arked and moved the seat fopr a while. I'm gonna unset any memory and not use it. this is frustrating.
what are my options? Will pulling the #11 fuse permanently avoid any drain if that circuit is the problem??
Should I buy a battery jump box and just live with it?
I've never had any other glitches, problems etc in normal use. ONLY if I don;t drive it for a day or more. I usually drive it every day. everything has been checked thoroughly, once in March and now again at a really good neighborhood shop that specializes in Hondas/Acuras. They said they rarely see this problem except for some cellphone bluetooth? systems in TLs.
thanks CLers. hopem this made some sense, I still love my CLS but I need it to start!

 

Check and see if your trunk light is burned out. If it is check the switch and see if it is broken and sending power to the light fixture at all times.

I say that because if the switch was bad that way then your trunk light would have been on all the time, discharging your battery at a slow rate. But if the bulb burned out recently then your intermittent draw would be gone now. I know its a long shot, but its worth a look.

 

You really need to take a voltage meeter to the fuse box and test each fuse slot tosee if you have an active drain while the car is off.

I had the same issue as you and found out that it was my automatic door locks. I have a drain in there somewhere and I don't know how to find it or fix it so I just live without automatic locks. lol.

 

Battery over 4 years old?

 

Battery was replaced in Dec.
One shop said last week, that the #11 circuit had a draw for a while and then fixed itself, this is the power seats,interior lights. I unset the seat memories. I had the seat set to move into and out of position when entering and exiting, maybe the seat control units were staying open. we'll see. I had replaced some interior bulbs with whiter bulbs (not LED), but that was years ago.
I'll check the trunk light too.
thanks.