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Hello all,
today I picked up an 04 sl500 for what I thought to be a steal but it has a few issues that I need some help identifying. For one, the radio does not work. Everything on the screen pops up (radio stations, navigation, etc.) but there is no sound coming from the speakers at all. Obviously like anyone else I want to be able to listen to music in a convertible, so as you can imagine that’s a little aggravating. Also, I have an issue with the keyless entry. The old owner just got a new key fob for the car, and I tested that with the old one to check if they were sending out infrared waves, which they are. The power locks work when the button is pressed in the interior, so I know the vacuum system is working, but the keys do not. I also tried the synchronization process which did not work. Can anyone help me pinpoint the issues? Thanks.
Hello all,
today I picked up an 04 sl500 for what I thought to be a steal but it has a few issues that I need some help identifying. For one, the radio does not work. Everything on the screen pops up (radio stations, navigation, etc.) but there is no sound coming from the speakers at all. Obviously like anyone else I want to be able to listen to music in a convertible, so as you can imagine that’s a little aggravating. Also, I have an issue with the keyless entry. The old owner just got a new key fob for the car, and I tested that with the old one to check if they were sending out infrared waves, which they are. The power locks work when the button is pressed in the interior, so I know the vacuum system is working, but the keys do not. I also tried the synchronization process which did not work. Can anyone help me pinpoint the issues? Thanks.
also forgot to mention. There is an SOS malfunction issue on the dash… not sure if that has something to do with the no sound
Also, I found this harness not connected to anything… could this be the issue? What would it normally connect to? Harness not connected to anything. Very corroded
A common issue is a failed/failing Teleaid module (This is the module that automatically made a SOS call to emergency services in the event of an accident. When the module is failing, it'll constantly attempt to call every couple of minutes, draining the battery. If it was removed improperly, it could be causing the no sound issue since the radio is silenced every time a call was attempted.. When removing the Teleaid module, the vehicle needs to be coded to tell the system it's not present, or else it';; produce a SOS warning light at each startup when the system checks for Teleaid operational status.
A common issue is a failed/failing Teleaid module (This is the module that automatically made a SOS call to emergency services in the event of an accident. When the module is failing, it'll constantly attempt to call every couple of minutes, draining the battery. If it was removed improperly, it could be causing the no sound issue since the radio is silenced every time a call was attempted.. When removing the Teleaid module, the vehicle needs to be coded to tell the system it's not present, or else it';; produce a SOS warning light at each startup when the system checks for Teleaid operational status.
where would the tele-aid module normally be located? The sos malfunction on the dash says that the tele-aid needs to be authorized
where would the tele-aid module normally be located? The sos malfunction on the dash says that the tele-aid needs to be authorized
The Teleaid module is located beneath the pad behind your center armrest between the 2 rear cubbies. When the module is removed, you need to use couplers to keep the fiber optic loop intact. With the symptoms you describe, there is a good chance that the previous owner simply removed the unit without installing a fiber optic couple in it's place.
The Teleaid module is located beneath the pad behind your center armrest between the 2 rear cubbies. When the module is removed, you need to use couplers to keep the fiber optic loop intact. With the symptoms you describe, there is a good chance that the previous owner simply removed the unit without installing a fiber optic couple in it's place.
the tele-aid module (unfortunately) is present. I have the car apart still in the garage for easy access to all of this stuff and saw it mounted and connected. Realized I do not have MOST and that my car seems to D2B judging by the connector. I have ordered a few fiber optic couplers to try to test the modules. What else, other than the tele-aid, COMMAND, and amplifier, is in the fiber optic loop? Having trouble finding info online and I’m a newbie to these type of issues and Benz’s in general. I appreciate the input so far. Thanks
scanned the car with an Autel MaxiCheck scanner and found no communication with CD changer, tele-aid module, COMMAND, central locking module, and driver side SAM. Could the SAM be causing all of the other issues? Or would one problem in the fiber optic loop cause the COMMAND to not communicate? Also, a new problem has come up, the rear driver window won’t roll all the way up. Replaced fuse and tried to resync but didn’t work. Any ideas? Thanks
Another update. I have realized that after checking out many diagrams of the fuse box behind the passenger seat under the storage compartment, mine does not resemble any of them. This is what mine looks like. I see it’s supposed to contain fuses 50-77 and three relays, while mine only has two relays, and fuses 56-75. I may be incorrect in what I’m saying but thought I’d share. This car is turning out to be a real project
Yes these cars are electrical nightmares. Most if not all of them have electrical problems that range from parasitic battery drains that drain the consumer battery in weeks or hours, to the never ending electrical problems you have.
Maybe Xentry would help diagnose the issue better than the Autel? At some point these cars are going to be worth nothing, as they are extremely difficult to repair.
Yes these cars are electrical nightmares. Most if not all of them have electrical problems that range from parasitic battery drains that drain the consumer battery in weeks or hours, to the never ending electrical problems you have.
Maybe Xentry would help diagnose the issue better than the Autel? At some point these cars are going to be worth nothing, as they are extremely difficult to repair.
it looks like I’m gonna have to invest in a MB-specific scanner, leaning towards iCarsoft MB II. I’ve ordered the fiber optic coupler to diagnose the radio but as far as the other stuff I’m stumped for now. Having a friend who’s a MB tech come look at the car this weekend. Didn’t realize it’d be this much of a nightmare!
Another update. I have realized that after checking out many diagrams of the fuse box behind the passenger seat under the storage compartment, mine does not resemble any of them. This is what mine looks like. I see it’s supposed to contain fuses 50-77 and three relays, while mine only has two relays, and fuses 56-75. I may be incorrect in what I’m saying but thought I’d share. This car is turning out to be a real project
Every gap between fuses is a fuse number. Not all configurations use all fuses, but you still need to count the gaps. Also there are horizontal fuses at the end. Your block looks very typical to me.
All of these posts point to the basics of auto ownership and associated issues. MB vehicles and all Euro brethren need “special treatment “ including maintenance items and related costs. Some MB owners chose to ignore this and neglect maintenance, and sell cars when IC lights come on.
OP may have purchased such and is faced with: DIY and investing in the BEST tools to diagnose and repair efficiently or guess and throw parts at problems, or qualified Indy, or Stealership experience.
These are the choices for out of warranty MB owners.
More details on your issues (fault codes) will help us help you.
All of these posts point to the basics of auto ownership and associated issues. MB vehicles and all Euro brethren need “special treatment “ including maintenance items and related costs. Some MB owners chose to ignore this and neglect maintenance, and sell cars when IC lights come on.
OP may have purchased such and is faced with: DIY and investing in the BEST tools to diagnose and repair efficiently or guess and throw parts at problems, or qualified Indy, or Stealership experience.
These are the choices for out of warranty MB owners.
More details on your issues (fault codes) will help us help you.
my scanner was unable to communicate with the central locking module, and all of the modules that are related to command. Everything powers on as it should, however. One thing I did discover though is that I’m getting a voltage reading of 12.07 volts from the consumer battery in the trunk. The previous owner replaced both batteries about two months ago, but the car still sat for a long time after so. Could that be the reason for the issues I’m having? As everyone can see I’m no expert, but 12.07 is pretty low, right? I am not getting “consumer electronics offline” message, however, so I’m not too sure if just dropping a battery in will do the trick
Every gap between fuses is a fuse number. Not all configurations use all fuses, but you still need to count the gaps. Also there are horizontal fuses at the end. Your block looks very typical to me.
Yes I am in the same boat with 2 of these gems. I think the xentry may be the best choice. I have the foxwell, but it is limited
i may pick up xentry. iCarsoft’s reviews that I read are not the most convincing. I have a friend who has a star diagnostic scanner (MB Master Tech) who I was trying to avoid calling, but looks like I’m gonna have to at this point. Not interested in driving a vehicle that’s not fully functioning, or having a huge blue brick in my garage!
All of these posts point to the basics of auto ownership and associated issues. MB vehicles and all Euro brethren need “special treatment “ including maintenance items and related costs. Some MB owners chose to ignore this and neglect maintenance, and sell cars when IC lights come on.
OP may have purchased such and is faced with: DIY and investing in the BEST tools to diagnose and repair efficiently or guess and throw parts at problems, or qualified Indy, or Stealership experience.
These are the choices for out of warranty MB owners.
More details on your issues (fault codes) will help us help you.
Also, in my last response I forgot to mention, the only light in the instrument cluster is the SOS needs authorization. Thought it wouldn’t be a big deal since most of the early-2000s cars have that system currently disabled. Not sure if that’s what’s causing my COMMAND not to work
i may pick up xentry. iCarsoft’s reviews that I read are not the most convincing. I have a friend who has a star diagnostic scanner (MB Master Tech) who I was trying to avoid calling, but looks like I’m gonna have to at this point. Not interested in driving a vehicle that’s not fully functioning, or having a huge blue brick in my garage!
Try pulling up each module individually. The quick test doesn't talk to every module and just because they don't register on quick test doesn't mean you can't communicate directly.
Try pulling up each module individually. The quick test doesn't talk to every module and just because they don't register on quick test doesn't mean you can't communicate directly.
just tried as you said but had no luck. I’m leaning toward just putting in an entirely new system (head unit, amplifier, etc.) since it doesn’t pay to spend a significant amount of money on a 17 year olds system. Does anyone know where the central locking control module is located? I can’t find anything online.
Also, in my last response I forgot to mention, the only light in the instrument cluster is the SOS needs authorization. Thought it wouldn’t be a big deal since most of the early-2000s cars have that system currently disabled. Not sure if that’s what’s causing my COMMAND not to work
On this car if the trunk handle gets stuck, the sos activates intermittently. These are goofy cars electronically.
Update, the radio just went on for a few minutes and then when I shut the car off for a minute and turned it back on the radio wouldn’t work again. Very confused
Also, in my last response I forgot to mention, the only light in the instrument cluster is the SOS needs authorization. Thought it wouldn’t be a big deal since most of the early-2000s cars have that system currently disabled. Not sure if that’s what’s causing my COMMAND not to work
On this car if the trunk handle gets stuck, the sos activates intermittently. These are goofy cars electronically.
The Teleaid module is located beneath the pad behind your center armrest between the 2 rear cubbies. When the module is removed, you need to use couplers to keep the fiber optic loop intact. With the symptoms you describe, there is a good chance that the previous owner simply removed the unit without installing a fiber optic couple in it's place.
have to give you credit… this seems to be the module that was causing to radio not to produce any sound! I ordered a few fiber optic couplers and decided to bypass everything except the head unit and amp, but after bypassing the CD player and tele aid module (which already had a coupler mounted fo the wires going fo it… not sure what was up with that) the radio now works!! Thank you to everyone who contributed their advice, now to just figure out why my keyless entry is not working!
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