CDI parasitic draw woes - Page 2 - PeachParts Mercedes-Benz Forum

spark3542 · #16 03-11-2023, 02:21 PM

I had disconnected both seat modules previously suspecting those early-on. I now disconnected cd and radio fuses (f26 and f28) at dash. We’ll see tomorrow

spark3542 · #17 03-12-2023, 12:48 PM

It started today without needing charger, so signs are positive that radio/cd circuit is the culprit. The radio hasn’t worked in over a year, so there may be a pattern here

ROLLGUY · #18 03-12-2023, 02:38 PM

Quote:

Originally Posted by spark3542

It started today without needing charger, so signs are positive that radio/cd circuit is the culprit. The radio hasn’t worked in over a year, so there may be a pattern here

I have added the radio/CD changer to my list of common draw sources on the 211 chassis. It made sense to me after I found out that the radio had not worked for months, and that it was about that same time that the draw was present. Thankfully for me and my niece, the radio in her car started working again! I also plugged in the passenger seat power connector as well (she is happy about that).

You might want to power up the CD and radio, and open the CD door. I think that is what caused the CD and radio to come back online on my niece's car. I assume it was stuck trying to open or close, and that was the source of the draw.

spark3542 · #19 04-14-2023, 04:36 PM

To close out my issue… The radio/cd circuit must have been the draw. With those fuses out, I haven’t used my charger in a month…strong crank even when sitting a couple days. I did replace the fuses briefly to see if radio/cd comes back to life, but no dice. So leaving those fuses out for good. Thanks Roll for allowing me to keep my sanity

ROLLGUY · #20 04-14-2023, 04:45 PM

Quote:

Originally Posted by spark3542

To close out my issue… The radio/cd circuit must have been the draw. With those fuses out, I haven’t used my charger in a month…strong crank even when sitting a couple days. I did replace the fuses briefly to see if radio/cd comes back to life, but no dice. So leaving those fuses out for good. Thanks Roll for allowing me to keep my sanity

I could not have imagined that my car was the only one with this issue. If it happened once, chances are it is a common problem. I am glad to know that your draw was solved!

engatwork · #21 04-14-2023, 07:06 PM

Thanks for the follow up. Glad yall resolved it.

Proctor750 · #22 04-16-2023, 09:43 PM

Mind sharing that list of common culprits?
I have had a draw for about 5 years LOL.
It's only enough to where the car sitting for more than 2 days will cause convenience functions to halt temporarily until it charges back up.
Daily use it's not an issue so I suspect very small draw. Radio works fine but passenger seat always thinks there's a passenger (leave belt plugged in) and passenger door doesn't communicate at all (no lights when opened).

ROLLGUY · #23 04-17-2023, 09:45 AM

Quote:

Originally Posted by Proctor750

Mind sharing that list of common culprits?
I have had a draw for about 5 years LOL.
It's only enough to where the car sitting for more than 2 days will cause convenience functions to halt temporarily until it charges back up.
Daily use it's not an issue so I suspect very small draw. Radio works fine but passenger seat always thinks there's a passenger (leave belt plugged in) and passenger door doesn't communicate at all (no lights when opened).

A few that I know of:
Radio/CD
Passenger seat module
Alternator

Youtube has some videos on this subject, and how to fix them. I am sure there are others, but these three I have personally dealt with (five 211's in my family).