i regret that i haven't had the time to dedicate to my benz as i had intended so i've been relying on mechanics and not DYI as i had intended. i joined when i bought my first 300td with many plans and much enthusiasm that went nowhere, as evidenced. i'm making an effort to better understand my second vehicle and attend to it personally and i appreciate your directions to investigate my current problem. my primary concern is safety and long term engine damage hence the urgent post.