I'd like to say hi to everyone and thank you in advance for any reply. Obviously I am a noob and this is my first E39. Please Help!! I have a 99 528i with 180k on the dash. About 3-4 days ago after my oil change I noticed some dry green fluid near the radiator of the car. I didn't think too much of it and ignored it for awhile and forgot about it. So today after doing about 80mph on the highway for 5 miles the engine over heats and there is alot of smoking. I shut the car down for half an hour and start it back up but the same thing happens until i finally made it to the nearest gas station and got towed home. What could the problem be? Also before this, every time i go to overtake another car or just speed off the car shakes alot and lacks power. I would just like to know what to expect before I see my mechanic.