C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

TELEAID BATTERY DRAIN

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Aug 29, 2013 | 07:47 PM
  #1  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
TELEAID BATTERY DRAIN

Hey all,
Upon my initial search of the persistent batt drain, using a multimeter, I found a dramatic drop once I pulled fuse no. 40 (teleaid). Any recommended solutions anyone?
I have yet to test more fuses in the trunk until tomorrow. For now the teleaid showed the drop.

Is it safe to just leave the #40 fuse out for a while?
Thanks for the assist.
Reply
Old Aug 30, 2013 | 02:18 AM
  #2  
Moviela's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
 
Joined: Jan 2005
Posts: 2,848
Likes: 15
From: Orange County
2005 C Wagon (No snickering please!)
Teleaid used an analog (AMPS) mobile phone system that has been turned off since 2008.

Unless you paid a small fortune for a new digital system, you can leave the fuse out forever because no one is listening.

How much did the current change? We all like to know.
Reply
Old Aug 31, 2013 | 04:29 PM
  #3  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Originally Posted by Moviela
Teleaid used an analog (AMPS) mobile phone system that has been turned off since 2008.

Unless you paid a small fortune for a new digital system, you can leave the fuse out forever because no one is listening.

How much did the current change? We all like to know.
I don't know how accurate my multimeter is -cheap Cen-tech $4 meter-but fuse in 0.39 -0.41. Fuse out 0.07.

It usually drains overnight so I take the neg. battery cable out every time. I will leave it hooked up tonight and see if it will grain with the fuse out.

Thanks.
Reply
Old Aug 31, 2013 | 10:55 PM
  #4  
Moviela's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
 
Joined: Jan 2005
Posts: 2,848
Likes: 15
From: Orange County
2005 C Wagon (No snickering please!)
Originally Posted by danev6972
I don't know how accurate my multimeter is -cheap Cen-tech $4 meter-but fuse in 0.39 -0.41. Fuse out 0.07.

It usually drains overnight so I take the neg. battery cable out every time. I will leave it hooked up tonight and see if it will grain with the fuse out.

Thanks.
400 milliamps sounds like a module has not gone to "sleep" and is still awake and listening to the canBUS. This usually occurs with seat modules in early production cars due to a lack of power supply bypassing.

70 milliamps sound like a normal key out current draw. Perhaps unplug the teleaid module in the trunk to confirm it is the bad actor.

I have a few CenTech meters from Harbor Freight. They are not going to replace my Fluke anytime soon, but they are reasonably accurate. I get them free from coupons in the mail.
Reply
Old Sep 2, 2013 | 03:29 PM
  #5  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Originally Posted by Moviela
400 milliamps sounds like a module has not gone to "sleep" and is still awake and listening to the canBUS. This usually occurs with seat modules in early production cars due to a lack of power supply bypassing.

70 milliamps sound like a normal key out current draw. Perhaps unplug the teleaid module in the trunk to confirm it is the bad actor.

I have a few CenTech meters from Harbor Freight. They are not going to replace my Fluke anytime soon, but they are reasonably accurate. I get them free from coupons in the mail.
Definitely the teleaid. Car started without a problem today. I did not even check the module.

The problem now is the malfunction messages. I have 2 of them: The teleaid, of course, and SRS(key in).

Is the SRS going to be a safety issue problem I have to be concerned about?

I know the codes can be erased...but by disconnecting the module solve the error messages?

Battery charge: 12.71 V (car off)

Thx.
Reply
Old Sep 2, 2013 | 04:08 PM
  #6  
Moviela's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
 
Joined: Jan 2005
Posts: 2,848
Likes: 15
From: Orange County
2005 C Wagon (No snickering please!)
Unplug the teleaid module, and use star das to remove it from the system. Replace the fuse #40. That fuse does not serve the SRS system. While star das is connected find out why the airbag system is taking the day off. You really need the service manual to safely work with the airbag system. It is expensive and dangerous if you trigger it accidently.

It is possible the SRS problem is related to the weight sensor in the passenger seat cushion.
Reply
Old Sep 3, 2013 | 12:48 AM
  #7  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
I appreciate your help Moviela.
I think this problem would not be fixed for a awhile. Funds are very limited at the moment just hardly working and in college. At least I know what is going on with the car.
I think i'll just keep on pulling the fuse after every use.

This really sucks.

Do you know the cost to remove it an an indie shop?

Thx.
Reply
Old Sep 5, 2013 | 03:58 PM
  #8  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Hey Moviela..or anybody,
Is this the teleaid module in the trunk?,,Pic attached.
Which one should I pull out?

Pls. help.

Thanks.
Attached Thumbnails TELEAID BATTERY DRAIN-teleaid.jpg  
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Sep 5, 2013 | 09:22 PM
  #9  
jrsmith_68's Avatar
Member
Veteran: Army
 
Joined: Aug 2007
Posts: 228
Likes: 39
From: Peoria, IL
2007 C350 2015 ML400 1968 Ford Mustang
No, not close. Its easy to get to, its under your trunk mat. Once the mat is out, remove the two bolts holding the plastic panel right in front of your spare. In the pic attached, ignore the black arrows. I have the Teleaid connector in the red box.
Attached Thumbnails TELEAID BATTERY DRAIN-9-5-2013-8-19-02-pm.jpg  
Reply
Old Sep 5, 2013 | 11:16 PM
  #10  
turbonos7's Avatar
Senior Member
 
Joined: Jun 2013
Posts: 262
Likes: 34
From: Houston, TX
'05 S430, '05 S600
Originally Posted by danev6972
Hey Moviela..or anybody,
Is this the teleaid module in the trunk?,,Pic attached.
Which one should I pull out?

Pls. help.

Thanks.
Negative! That's your rear SAM (Signal Acquisition Module), the teleaid module is the one on the picture from jrsmith. It's the one on the left with the orange sticker on it.
Reply
Old Sep 6, 2013 | 02:18 AM
  #11  
turbonos7's Avatar
Senior Member
 
Joined: Jun 2013
Posts: 262
Likes: 34
From: Houston, TX
'05 S430, '05 S600
SRS? Who's talking about that? He already removed the fuse to the teleaid module anyways so I don't follow....?
Reply
Old Sep 6, 2013 | 01:30 PM
  #12  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Originally Posted by turbonos7
SRS? Who's talking about that? He already removed the fuse to the teleaid module anyways so I don't follow....?
Thanks guys..Ill play with it tomorrow.

@turbonos: The SRS error appears when I pull the fuse out with the key in the ignition...Don't know why. I'm testing if I put the fuse back in but take the module connection off ,maybe it will get rid of the SRS light. It only happens when the key is in. I only get the teleaid error in key out.
Thanks for the help.
Reply
Old Sep 6, 2013 | 04:49 PM
  #13  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
FOUND IT!!!

Now the million dollar question: How do you take it out?


Is the whole black part it? Does it pull straight out? I tried and felt like I was pulling enough already but it would not come off. Also tried to pull that metal part out without success.

Just don't want to break anything...looks expensive.

Thanks.
Pic attached.
Attached Thumbnails TELEAID BATTERY DRAIN-teleaid.jpg  
Reply
Old Sep 7, 2013 | 12:33 AM
  #14  
jrsmith_68's Avatar
Member
Veteran: Army
 
Joined: Aug 2007
Posts: 228
Likes: 39
From: Peoria, IL
2007 C350 2015 ML400 1968 Ford Mustang
Originally Posted by danev6972
FOUND IT!!!

Now the million dollar question: How do you take it out?


Is the whole black part it? Does it pull straight out? I tried and felt like I was pulling enough already but it would not come off. Also tried to pull that metal part out without success.

Just don't want to break anything...looks expensive.

Thanks.
Pic attached.
The metal tab rotates. You have to unclip it from the side.
Reply
Old Sep 7, 2013 | 11:50 PM
  #15  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Got it out! I put fuse # 40 back in. The problem still persists. Still getting the SRS warning when key is in. There are no malfunctions if I put everything back.

Why is the SRS acting up if it not related to teleaid? And teleaid is analog,is it not?

Does this mean the aribag won't be working?
Reply
Old Sep 8, 2013 | 03:53 PM
  #16  
Moviela's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
 
Joined: Jan 2005
Posts: 2,848
Likes: 15
From: Orange County
2005 C Wagon (No snickering please!)
The SRS is connected digitally to the TeleAid on the canBUS. The TeleAid radio is analog, but it communicates over the canBUS with the car.

As designed the modules on the canBUS go into a sleep mode when not spoken to for a period of time. Some modules have a history of staying awake (like children) when they should be sleeping. The early seat modules are the worst offenders.

The SRS system can alert TeleAid (when it was live) that an airbag had been deployed. TeleAid would alert the police of your location. The SRS might be complaining that the TeleAid is not listening when you remove the fuse or unplug the Motorola TeleAid module.

I suggest you get a Star DAS service shop to recode the SAM that TeleAid is not present, and the SRS system should settle down. You can then remove the Motorola box.
Reply
Old Sep 8, 2013 | 04:54 PM
  #17  
VVF's Avatar
VVF
MBWorld Fanatic!
 
Joined: Sep 2011
Posts: 1,657
Likes: 35
From: Austin, TX
2005 C230K(sold), Mk7 Jetta
Or get a relay and install it in series with the TeleAid fuse maybe? It would "pull the fuse" when you turn the car off, and "plug the fuse back" when you turn it on.
Is there a switched 12V in there close?
Reply
Old Sep 8, 2013 | 07:08 PM
  #18  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Guess I have no other choice but go to the shop.

Is the airbag still going to work with the module unplugged?

Thx guys..
Reply
Old Sep 25, 2013 | 02:01 AM
  #19  
danev6972's Avatar
Thread Starter
Senior Member
 
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
I found a used module on ebay for $59. Do you guys think it is worth getting it?
Will a different module fix the problem or is it an electrical problem caused by something else that affected the teleaid?
Anybody Pls reply. I'm planning to buy it as soon as I get some opinion/s. Pulling the fuse out every time is getting annoying. I never used teleaid and I can't afford an upgrade either. Just want to rid of the persistent drain problem and error messages.

Thanks.
Reply
Old Sep 25, 2013 | 04:54 AM
  #20  
Moviela's Avatar
MBWorld Fanatic!
20 Year Member
Photogenic
Photoriffic
 
Joined: Jan 2005
Posts: 2,848
Likes: 15
From: Orange County
2005 C Wagon (No snickering please!)
A teleaid module has a value of zero. Find a garage with a star diagnosis system and change the version coding to remove teleaid. Then take out the module.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 05:10 PM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE