C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Upgrade Seats

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Old Mar 14, 2019 | 04:00 PM
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C-Class W204 220 CDI
Upgrade Seats

Hi recently bought a 2012 C Class 220 CDI. Absolutely love it, was a bit tatty inside so have had to do various interior upgrades to bring it up to the condition it deserved. New Comand NTG 4.5 fascia, new heater control, new sun visor and new lower dash trim and a good clean right through.

The final change I need some help on as I'm having some difficulty in getting the information required so was hoping that someone could help me with the answer.

I need to modify a 2015 Mercedes C Class 220 CDI W205 Model front seats, so that I can get them to work in a 2012 Mercedes C Class 220 CDI W204 Model. The wiring colour code is different on the W205 seats. What I need to know is at present the colour of the wires for the W205 passenger seat occupancy sensor is 1 x Brown Wire, 1 x Pink/Black Wire & 1 x Pink/Green Wire on the original seat W204 the colours were 1 x Brown Wire (GND), 1 x Black Wire (+12v) & 1 x Blue Wire (Signal).

What I need to know is what colour wire is the GND, what is the +12v and what is the signal wire on the W205 Passenger Seat Occupancy Sensor.

Also the Seat Airbag wiring has different colours, on the W204 seat, the wires are 1 x Red/Blue Wire and 1 x White/ Violet Wire and on the W205 Seat the wires are 1 x Grey/Yellow Wire and 1 x Brown Wire.

What I need to know is which wires do I connect the W205 Wires to i.e Grey/Yellow wire to the original W204 Red/Blue wire this is just an example what I really need is which W205 wire to W204 wire.

As I need to use the original W204 Plugs under the seats, once I know which wires are to be joined together, they will be solder joined with a shrink sleeve fitted over

Hope this makes sense.
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Old Mar 14, 2019 | 10:36 PM
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bone stock E55 AMG
moved to W204 forum...
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Old Sep 29, 2022 | 05:30 PM
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C63 Coupe
Did you ever manage to get the seats in and working?
looking to do the same in my 204 C63
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