Good to see you back. If you use P.05 before you start draining will help it drain better so the rod will be extended in mid position. Hope this tip is handy. P.s test program can vary depending on model best to check MI's to see it can be done
Hey Chris. Great to see you back again. Hope parents are in better health and all is good with you mate. Good info with the vaillant too. Which van are you driving by the way. ? Cheers. Mac