Approximately a year ago I bought a brand new Mondeo MK4/MK4.5 steering wheel on Ebay. It was a black leather steering wheel with radio control buttons and info display control buttons but without the cruise control buttons and the airbag. Because it was a real bargain I decided to buy the steering wheel and search for a suitable airbag and cruise control buttons afterwards.
As described the steering wheel was in excellent (new) condition.
After I got the steering wheel I started the search for a suitable airbag. After 2012 Ford changed the Mondeo MK4/MK4.5 steering wheel and airbag. Because I had the new design steering wheel I also needed the new design airbag. Finding a used new design airbag for a reasonable price turned out to be the same as finding a needle in a haystack. Most Mondeo steering wheel airbags at scrapyards or Ebay are old design airbags which do not fit my steering wheel. Eventually I found one new design airbag but the seller asked way too much money for it.
Because I could not find a suitable used airbag for a reasonable price I decided to buy a brand new airbag. Next to several Dutch Ford dealers I also E-mailed to a number of Ford dealers across Europe. There turned out to be a incredible price difference between Ford dealers across Europe. Eventually I found a Ford dealer in Poland which quoted me the best price. Including shipping the new airbag costed me half the price as the same airbag from a Dutch Ford dealer.
Next I started the search for a pair of Mondeo MK4/MK4.5 cruise control buttons. These are relative rare which results in high prices. After searching online and at scrapyards for over a month I finally found a pair of suitable cruise control buttons. They came from a very young low mileage Mondeo MK4.5 which was scrapped.
After I got all needed parts the challenge just began. All of the buttons of the Mondeo steering wheel needed to be converted to work with the Focus MK2 electronics. Converting the radio control buttons and info display buttons was relatively easy. The radio control buttons of the Mondeo steering wheel have exactly the same resistance values as the Focus MK2/MK2.5 stalk control. The only difference is that the Focus MK2/MK2.5 buttons connect the sensing wire through the resistances to ground while the Mondeo radio control connects the sensing wire to a second wire which is not connected to ground. To solve this I only had to connect the second wire to ground. The info display control buttons of the Mondeo steering wheel are also uses resistance values for the different functions while the Focus MK2/MK2.5 uses switches which connect to ground. To solve this I removed all resistances and connected and made some connections on the circuit board. I use the UP/DOWN button to scroll through the menu and the LEFT/RIGHT/OK button to select the options/settings. This is because the Mondeo info display control has 5 buttons while the Focus MK2/MK2.5 info display has only 3 functions.
After these buttons were finished and tested I started to convert the cruise control buttons. The Mondeo MK4/MK4.5 uses completely different resistance values as the Focus MK2/MK2.5. I changed all resistors on the Mondeo circuit board for the correct values for the Focus MK2/MK2.5. Despite all resistance values were exactly the same it did not work correctly. It turned out to be very unreliable. I decided to make my own circuit boards with microswitches on it. These microswitches are connected using small wires to a pair of original Focus MK2/MK2.5 cruise control circuit boards which are mounted below the Mondeo button holders. This setup functions very well and is much more reliable than my previous attempt.
The next problem was that all functions of the Mondeo MK4/MK4.5 steering wheel require 10 wires while the Focus MK2/MK2.5 originally only has 7 wires. The Focus MK2/MK2.5 clockspring has 2 additional tracks which are not connected at the steering wheel side. Soldering 2 wires directly onto the tracks of the clockspring ads 2 wires to the existing 7. This results in a Focus clockspring with 9 wires but there is still 1 wire short. I solved this problem by sending all 3 info display signals over just 2 wires. To do this I made an electrical circuitry using diodes to join the 3 info display wires on the steering wheel side to 2 wires. On de steering collumn side I made an electrical circuitry using micro relays to seperate the 2 info display wires back to 3 wires. This circuitry functions very well.
Today I installed the Mondeo MK4.5 steering wheel into my car. It looks great and all functions of the steering wheel work.
Note that installing a Mondeo MK4/MK4.5 steering wheel to a Focus MK2/MK2.5 is really a lot of work. It is not a suitable modification for beginners.