My xfire won't change up gear, im told it is corrosion on the pcb and is a specialist job. Can anyone suggest where in Scotland I can get this done.
thank you.

 

What PCB do you mean the one from the TCM under the floor on the passenger side? If yes there are only two possibilities why it have corrosion:
1. The drains for the rainwater under the hood are clocked and water comes into the crossfire.
2. The seal at the plug of the transmission is leaking and the oil goes over the harness in the TCM and destroyed it.
So you have first to solve the issue what gets the TCM to be corroded.
You can buy a used TCM (look at the Part number and software version to buy the same). I don't think a repair is the best option.

 

I believe its the TCM that is the problem and has to be replaced, unfortunately I can't find someone to do it but keep being told it will be in excess of £600.
thanks for the reply !

 

look on ebay lots of them look at yours and get the same p/n they are from $75 up. you should also get a rcm (Mercedes K40) those interchange srt6 and limited,

 

You can find some TCMs here: ebay TCM A0335451232 please confirm that you have the same part number.
And here you can find the module, you need only a 10mm wrench to open the three black plastic nuts: But how I wrote, you have to find the reason why it corrodes.

 

Once again thank you some much for the help I am so grateful.
I am on nightshift and upside down at the moment.
I gave the fail code somewhere and if it is the TCM ( im sure it is ) I'll definitely replace it myself.