Hey thanks guys for help, I've tried Ecu testing and their answer was that the ecu was beyond repairable as it wasnt talking via the bench harness to their computer, no can bus signal. Got the immo code of the cluster but for the coding procedure is the old ecu pin needed. So I left the both ecus with garage as the guy has an friend in Glasgow who can try to bench solder the old immo3 chip into new motherboard, absolute nightmare. So waiting for the outcome. Even getting rid of the immo would be better than 1200£ from vw...