Hi--- I have an '81 240D fitted with the 2-tank Greasecar system. Don't do too much of my own work, but I'm using the 75 MPH Guide to keep Anna happy and healthy. So far, so good... but, I've gone through 3 water pumps in less than 10,000 miles. The 1st was the original, so I new that would happen. And it did at exactly 120,000. Had it replaced with a Bosch, which promptly failed. Had it replaced again with a German pump, the name eludes me. Well, this pump also failed and I'm having it replaced with a Mercedes pump. Fortunately, this is all warranty work. Although my mechanic says it's just bad luck, my concern is that there's something engine related that's contributing to all these failures. Could this be possible? Any suggestions or advice and greatly be appreciated. Thankyouverymuch!!!