rab60bit88 Posted July 22, 2024 Share Posted July 22, 2024 I only use my W140 vehicle on a monthly basis for a 300-mile round trip to my workplace. However, when I recently relocated over the weekend to clean it before this month's excursion, I discovered that the battery was entirely depleted. I attempted to use a power pack as well as attempted to jumpstart the device using a spare battery, but both methods were ineffective. Consequently, I proceeded to recharge the battery. The battery, which was installed in 2023, does not seem to be the cause of the issue. However, I did observe that it never fully charges throughout the recharging process. After a duration of around 3 to 4 hours, I attempted to start it and it functioned well, although with the SRS light on. Yesterday, I attempted to relocate my car in order to refuel it, as I planned to use it for my work commute the following day. However, I encountered the issue of a depleted battery once again. Fortunately, I had a spare battery that was identical to the original, so I replaced it and successfully started the car. However, the SRS light remains illuminated and does not turn off, even after running the car for a duration of five minutes. I assume that there may be a parasitic drain on the battery originating from an unknown source, resulting in the battery being discharged. Could you kindly provide your insights on this matter, as well as any information on the SRS light? Thank you. Quote Link to comment Share on other sites More sharing options...
rab60bit88 Posted July 22, 2024 Author Share Posted July 22, 2024 Do you have any insights on the SRS light illuminating and staying on after a battery has been drained or disconnected? Is it possible to delete codes using inexpensive OBD diagnostic units and phone applications? Quote Link to comment Share on other sites More sharing options...
BENZE220AMG Posted July 22, 2024 Share Posted July 22, 2024 To get SRS codes, you will need either a STAR or a professional equivalent. My local independent business does it in return for a few alcoholic beverage vouchers. Quote Link to comment Share on other sites More sharing options...
rab60bit88 Posted July 22, 2024 Author Share Posted July 22, 2024 Thank you, BENZE220AMG Quote Link to comment Share on other sites More sharing options...
rab60bit88 Posted July 22, 2024 Author Share Posted July 22, 2024 Is the OBD port often located under the flap in the driver's side footwell? Quote Link to comment Share on other sites More sharing options...
KOOLCAR Posted July 22, 2024 Share Posted July 22, 2024 Is the alternator malfunctioning? Quote Link to comment Share on other sites More sharing options...
johnmayerrr Posted July 22, 2024 Share Posted July 22, 2024 Could this use the 38-pin HHT diagnostics port located in the engine compartment, considering that it could be too early for the OBD 16-pin port? However, I lack expertise in this matter. Quote Link to comment Share on other sites More sharing options...
SD1too Posted July 22, 2024 Share Posted July 22, 2024 Is the keyboard malfunctioning? Quote Link to comment Share on other sites More sharing options...
rab60bit88 Posted July 22, 2024 Author Share Posted July 22, 2024 Could you kindly provide the location of the 38-pin port? Quote Link to comment Share on other sites More sharing options...
KOOLCAR Posted July 22, 2024 Share Posted July 22, 2024 http://web.archive.org/web/20090322063302/http://www.k6jrf.com/MB_X11.html Quote Link to comment Share on other sites More sharing options...
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