Mercedes SLK World banner

1 - 18 of 18 Posts

·
Registered 2006 SLK55 AMG
Joined
·
79 Posts
Discussion Starter #1
As above, I’ve been struggling with a parasitic drain for a few months now, reading through some of the (many) threads on similar subjects it seems one of the “usual suspects” is a failing/failed tracker.

Just looking through the mountain of information I have for the car and I can see that this car had a tracker fitted from new (back in 2006).
Bearing in mind this is a UK car with a system from “TRACKER information & location solutions” can anybody tell me where this unit may be fitted or where the wiring will be attached to the car?
 

·
Administrator 2009 SLK 55 AMG/Founding member 2006
Joined
·
94,921 Posts
for lojack in usa, it was under the passenger floorboard
 

·
Premium Member 2013 SLK55 AMG
Joined
·
1,782 Posts
My white 171 had a tracker fitted. Trackers need power, mine had been wired into the feed to the 12V power supply in passenger footwell. It may be worth pulling the ash tray or cubby box and checking for any 3rd party wires spliced in.
TonyS
 

·
DAS/STAR Registered Owner 2005 SLK 55 AMG
Joined
·
4,022 Posts
Check the area around the rear SAM - easy to hide in there ...
 

·
Registered 2006 SLK55 AMG
Joined
·
79 Posts
Discussion Starter #7
Thanks for the replies all, going to have a good look for it today (nothing else to do at home!)

Already tried around the rear SAM (can’t believe they need 10 M6 bolts to hold that in place, also can’t believe MB don’t trim the ends of the tie wraps!) nothing there which shouldn’t be.
 

·
Registered 2005 SLK55 AMG
Joined
·
790 Posts
Allegedly my 05 has a tracker somewhere. They only start draining when their backup battery fails. In 6 years of dismantling and poking around I never found it. I'm sure it's no secret to any competent thief. In my Escort RS Cos it was behind the rear wing panel. I guess it needs to be able to transmit so cannot be too buried.

Maya~Taptalk
 

·
Registered 2006 SLK55 AMG
Joined
·
79 Posts
Discussion Starter #9
Managed to find it, or a5 least I’ve found a piece of alien technology which has Motorola on it so I’m assuming that’s it, I’ll not reveal where in open forum, it’s probably public domain by no but I don’t want to be the loose lips.

There are 2 sets of wires connected, one has 3 wires and is fairly obviously the power (permanent live, act live and earth, the other has 3 wires all wound together. Anyone got an idea what they may be? Was bothered they may be some sort of immobiliser but car works with them disconnected.

As mentioned in previous post the problem with these most likely occurs when internal battery fails which would be consistent with the sudden change in behaviour.
I took the battery out voltage measures circa 4.5 when open circuit which, for a 6v battery I’m assuming means it’s failed. This may also fit in with the fact that after charging the drain appears to be small for several hours then creases.

Fingers crossed this is the issue, time will tell.
Thanks to everyone for their help
 

·
Registered 2006 SLK55 AMG
Joined
·
79 Posts
Discussion Starter #10
That should have read the drain is small for several hours the INCREASES. Bloody smell checker!
 

·
Registered 2006 SLK55 AMG
Joined
·
79 Posts
Discussion Starter #12
Cheers AD, just hope there’s a pot of gold at the end, just charging battery now and see what it reads tomorrow morning, recently it’s been losing about 8% per day
 

·
Registered 2006 SLK55 AMG
Joined
·
79 Posts
Discussion Starter #13
While work8ng on the car yesterday with doors & boot (trunk) open the battery charge had dropped so I had to charge it. I unhooked the charger at 18:00 at this time it had got to 76%.
At around 10:30 I checked again, still at 76%, no great surprise, on their occasions when I’ve tracked the charge it has remained fairly constant for several hours then dropped.
I checked again at 06:30 this morning and the charge was not the same. It had gone UP, now at 91%, I have never seen it rise before. Just checked again (11:00) and it has dropped slightly to 89%.


WARNING! Long boring musing follows, you may want to move on now!

What on earth is happening here? Well first of all I’m reasonably happy that the charge has not reduced and I’m optimistic that removing the tracker has addressed the battery drain issue but why is the charge rising? I suspect that this is due to the ambient temperature. In recent tests the ambient temperature has been low (single figures Celsius) with not much swing between night and day. We have now flipped to spring time (maybe helped by the reduction in aviation), yesterday evening the temperature was quite high, circa 15*C, overnight it got down to around zero. If the charge is measured against capacity and capacity reduces with temp then for a given level of energy the charge %age will be higher at low temp’s. The ambient temp is now rising but the car is in the shade, CTEK showing 6*, but I’m going to leave it alone and see if the charge value drops back to yesterday’s value when it warms up.
 

·
Registered 2005 SLK55 AMG
Joined
·
790 Posts
Interesting subject this. At about the time my car was new, a lot of UK dealers were offering Tracker or Trakbak as an extra on new high risk cars. I wonder how many of us have cars with redundant trackers that are causing battery drain!

FYI, when I bought my used Cossie I needed my tracker live. In order to do this, the Company performed an obligatory service which involved replacing it's backup battery and the car was only 6 years old. It worked well and in fact one time when the car needed to be trailered, I forgot to alert Tracker and within 1/2 mile and five minutes, they were on the horn warning me my car was on the move. I was actually in the trailer cab!

On the subject of temperature, I also find the voltage drops more (my Ring RSC gives me a complete readout of the battery's status) in colder weather so I always connect the smart charger even if it's only a few days.

Maya~Taptalk
 

·
Registered 2006 SLK55 AMG
Joined
·
79 Posts
Discussion Starter #15
Well it’s still holding at 88% even though the temperature has come up, maybe the car’s giving back s9me of the power it’s robbed off me over the past few months!
 

·
Super Moderator CA 2012 SLK55 AMG w/P30
Joined
·
12,451 Posts
On the subject of temperature, I also find the voltage drops more (my Ring RSC gives me a complete readout of the battery's status) in colder weather so I always connect the smart charger even if it's only a few days.
Is this what you are referring to (ring RSC) ?
 

·
Registered 2005 SLK55 AMG
Joined
·
790 Posts
Is this what you are referring to (ring RSC) ?
No, but I'm intrigued! It's a Ring RSC612 (Ring smart charger). It's like a big clunky Ctek and it does everything including crank power and alternator check etc. It came with horrid old fashioned clamps so I have soldered a couple of those clever Ctek quick connect thingies and routed them outside of the battery compartment
RSC612_1.jpg


Maya ~ Taptalk
 

·
Super Moderator CA 2012 SLK55 AMG w/P30
Joined
·
12,451 Posts
No, but I'm intrigued! It's a Ring RSC612 (Ring smart charger).
Ah, well then here's the reference (although currently not available)
 
1 - 18 of 18 Posts
Top