Hi everyone. Have some trouble with my 2013 FL2 recently by where it really struggles to start in the cold. Once the engine is warm then no problems. No problems on a warm day either. Glow plugs, glow plug relay/control module, and battery have been replaced but not changed anything. Battery also has a second earth connected to the starter motor to try and help. No error codes register on a garage diagnostic either. Any help much appreciated. Thanks all