After visiting us with the dreaded Restricted performance light on an XF we have diagnosed as EGR failure and replaced the EGR valve. Following this the DPF was 82% blocked. We have ran a 2 part cleaner through the DPF followed by a regeneration lowering the soot level to 6%. This is an extremely cost effective repair as most garages will simply replace the particulate filter at this soot level costing well over £1000.
Another happy customer with a massive saving over potential repair costs.