[W126 Coupe] Long term Battery drain problem

[Vance Rowley]

Hi Steve,
  
 I was thinking about that, but I think I might try the rear heated window first just to prove the theory on that one either is,or isn't correct. 
Thinking about it, you are most likely correct about the contacts being corroded or poor to say the least. One thing I didn't mention previously is the last time I drove the car and needed the rear heated window to de-mist, it didn't seem to be working very well. It used to. So putting 2 and 2 together, bad contacts would certainly be suspect on that one. Trouble is though, with this relay having a timer built into it, it ties in with the intermittent current draw and could be more likely the timer circuit coming on and off randomly and still feeding the heated window. Only difference being it's not getting the full current because of bad or dirty contacts.

All speculation at this point, but once I have tried replacing the relay and pulled fuse#3 and got a result (one way or the other) I will take it from there and then open up the relay.

Thanks,
Vance


----- Original Message ----- 
From: "Steve Nervig" <dakota at mac.com>
To: "Vance Rowley" <vance.rowley at tiscali.co.uk>; "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Tuesday, March 14, 2006 4:24 AM
Subject: Re: [W126 Coupe] Long term Battery drain problem


> 
> Vance, why not open the relay up and check the 'points' in there.  
> Maybe they are corroded and/or sticking. Cleaning the contacts might  
> work. Worth a try.
> 
> Steve