Hi, I’ve just got an Audi A4 diesel 2.0tdi and I don’t think it’s been looked after very well, EGR clogged up and now an anti shudder problem. I’ve cleaned them but the anti shudder keeps popping back up. Anyway, I’m going on a long drive next weekend and I’m wondering what you would (or would not!) recommend to give the engine a good clean out.