W203 (Pre-facelift) - Aftermarket Headunit No Power

[Captain K]

Hi Guys,

I'm a newbie on here, so just wanted to say a quick Hello to everyone!

I have a 2003 Mercedes C220 CDi.

I have removed the original head unit, and wanted to replace it with an aftermarket unit. I have wired up the new unit using the correct wiring harness. However the new uni is not powering up, and i really don't know what the problem could be.

The new head unit definately works, as i have tried it in a different car. The wiring harness is OK too as i have tested this with a different car.

Any help would be appreciated

 

[leicschris]

Hi
Check the ISO connector with a multi-meter, I have recently removed the command from my w220 and replaced it with a double din multi media head unit and I didn't have an ignition powered positive on my MB connector.

You need both permanent positive and switched positive to turn on and run the aftermarket head units

Chris

 

[gIzzE]

You definitely have the right harness?
Steering wheel can bus adapter is what you need, this converts the can bus on signal to 12v switched.

 

[gIzzE]

This is what you need....


Connects2 CTSMC006 - Mercedes C Class <2004 Steering Wheel Stalk Control Adaptor Lead

 

[Captain K]

Thanks for the replies guys.

Yes, the wiring harness i have is the correct one (but is not designed to control the steering wheel controls)

GIzee, thanks for the link. If i buy that will that solve the problem of the power supply?

 

[gIzzE]

Yeah.

What harness have you got then?

You need one with a can bus adapter built in, to convert the can bus ignition on the 12v switched.

 

[Captain K]

Yeah.

What harness have you got then?

You need one with a can bus adapter built in, to convert the can bus ignition on the 12v switched.

Thanks you so much for your help!!

I have ordered it now, and will fit in at the weekend