tw2

If it is a low to moderate power amplifier and/or only running the stock speakers then the existing wiring should be adequate. If you are wanting to run large aftermarket subs or high power speakers in the stock locations then run a separate power/ground.

ahmedhossame

My amp is 700 Watt 5 channels. will this one require new power lines from battery. What is the cut-off watts that requires new power cables.

megacrazy

Check what the stock amp is. I would consider that the cutoff.


Also, if you have a center speaker you're going to need 2 amps probably so you'll have to run power cables anyway.

ahmedhossame

It will one AMP only to run 4 speakers and center subwoofer. I'll have to call Mercedes to know how may watts is the stock AMP.

megacrazy

You don't have a center speaker?


Regardless, you're going to have to open everything up to run speaker wires anyway. Might as well run the power wires at the same time while everything is taken apart.

ahmedhossame

I'm not replacing the speakers. Only amp and headunit. There is no need for speakers change

megacrazy

You need to run wires from the amp to the head unit.

ahmedhossame

that's true. is it hard to run new power lines from battery? I have done many interior and mechanical work on cars but not running wires. any ideas.

ahmedhossame

Do you if I should use the pre-out ports on my Headunit to connect to AMP?

megacrazy

It's simple. It's just time consuming because you have to take some interior panels off. You don't have to drill any holes to get into the engine bay. Just run through the stock locations. That's what I did.

ahmedhossame

I'll try to take pictures. My weekend is booked now

tw2

I would definitely run a power cable from the battery with an amp like that. Check out my C32 link in my signature https://mbworld.org/forums/c-class-w...tallation.html this is how I did it. Not hard.

ahmedhossame

Great job. Those pictures will definitely make my job easier. I was wondering why did you have to run a wire through the red fuse where the cable kit should come with a fuse?

tw2

I bought all the parts separately- 5 meters of cable, fuse, fuse holder (the one next to the battery was the only one I used). I don't like the kits, they don't always have everything that I want and usually come with things I don't want or would prefer something else.

Rudeney

Placing the amp in the trunk, you already have a high-power lead there for the rear SAM. You should be able to tap into that - it's rated at 200 amps.

ahmedhossame

Help needed!
I started the project, I was able to run the 12VDC wire from the battery and removed the interior. That was easy because Mercedes is well built car. When I removed the cover from the right side in the trunk there was no AMP. I figured out that my model doesn't have the amp.

The other problem is the main wire harness connected to the factory radio are power and CAN harness and the fiber optics cable. I can't find the speakers harness. Any ideas about this model?

tw2

There must be an amp OR the speaker wires will be at the back of the head unit. Take a photo of the wires behind the stock head unit. Maybe the amp could be on the other side of the trunk?

ahmedhossame

I called the dealer with my vin and they told me I have the harmon kardon sound system.
Any ideas about this system?
Does it have an amplifier

Rudeney

If you have a coupe, the amp should be on the right side of the trunk, around the wheel housing. I think the cabriolet has the amp under the trunk floor, just behind the back seat.

ahmedhossame

I found my AMP is on rear left side behind convertible top oil pump.
its hard to access this area to remove. I'm trying now.

ahmedhossame

Should I use the speakers PRE-OUT RCA to connect to my new amplifier or use the wire harness wires for the speakers.

Also, does anyone know the wire codes for the power harness on this Mercedes?

ahmedhossame

I almost figured it out and completed this project. But as I was putting things back together, after I installed the passenger seat the SRS light warning came. Can anyone assist me to what wire or fuses I need to check for SRS warning.
I'm trying to avoid a trip to the dealer.

Rudeney

Sorry, most all SRS errors have to be reset via Start Diagnosis System (SDS). Unless you can find a local indy with a copy, this will mean a trip to the dealer. If you turned on the ignition with the upper control panel (the one with the passenger airbag light on it) removed, then that may be the error, and it;s a :hard" error, requiring it to be manually cleared with SDS. If you simply didn't connect the passenger seat wiring correctly and the fault is with the seat weight sensor, you might get that to clear by fixing that connection. If not, then SDS will be needed.

ahmedhossame

Rodney, I'm installing rear view camera and I need to connect the +12V DC of the camera to the reverse wire harness wire. Do you have any idea what is the wire code on the taillight harness. Otherwise I have to do it by trial and error.

Rudeney

I don't know which wire to use, but i would not connect it that way. The rear SAM sense bulb outages based on current draw. Having the camera drawing additional current from the backup light bulb circuit might make the SAM see this as a problem. I would connect the camera to a switched 12v power supply via the fuse block om the rear SAM. If you need to pickup a signal for "reverse" for the head unit, there are two ways. One, the CAN bus adapters that give you steering wheel controls sometimes also include a reverse output. If not, then you can tap into the wiring on the shifter gear indicator on the center console. I am not sure which one it is, but it shouldn't be hard to ring it out.