[old grey steve]

The DSC units on these cars can as tmarshalls stated let go it would seem without warning. It would be very difficult to prove a link re the work you've had carried and the DSC light as abrasive fluid change really is a straightforward operation to carry out.

Sadly though, new brake fluid can trigger a reaction in the unit they seem that delicate but its also worth noting especially with the 6 cylinder units that the DSC software updates available can cause problems and there's a real reluctance to carry out the update. The 4 cylinder repair units anywhere between £140odd and £168 +VAT which isn't so bad, while the 6 cylinder units are a good £1700 + VAT or a refurb if its possible by someone like ECU Testing) which is why the procedure if the updates there in many people's opinion is risky to do(we go as far as to per warn upfront the implications of the update)