yes i know , but ... as soon as the engine is running any higher rpm is irrelevant , as the smart charge system takes over and regulates charging, the smart system can put out over 100a at idle
diesel filter and plugs should sort it. this coming from an engineer and many years of diesel car ownership, and not just some forum nerd. when the light goes out turn the ignition off and back on and repeat the process a couple of times before you fire it up