If you are burning oil and want to take care of that only. I think the valve seals should take care of that. I have seen many more posts where W124 M103 owners were burning a quart every 500 miles and the valve seals fixed this. My old 86 had this done at 123,000 and it didn't burn a drop after that. Mine also burned about a quart every 1000 miles. I think I paid about $350 US for that as he did not have to remove the heads for this.

Hope this helps.

MW

93' 400e
86' 300e (sold)