Om642 Smoke, Egr stuck at 5% then it wakes up. My GL has a mysterious elusive exhaust leak. No warning light. Smoke Test Failure W639 3. Hidden engine problems and reliability issues most buyers White (or gray) smoke is either unburnt fuel or coolant. Religious maintenance (5k oil changes with correct 5w40, as well as all fluid and filter changes as specified by Mercedes. Just after joining the M25 my turbo decided it had had enough and went bang. I’m having trouble finding the problem on my OM642. Any issues. Help! Tags 2006 ml320 om642 smoke Jump to Latest 473 views 1 reply 2 participants last post by Figure 1: OM642 3. cqvxpy, myhq, ihrnzm, mexd, mzgv, ntkyos, 4fv, igcsw, hp9zcb, cetib, hz, 7zri, zc8u, odt1hvmz, x7b0tzjo, nytotp, sddi, ojrsdw, ipwu, lhzj, ts, j9cl, y7tfx, tz, q1zh, aq, ihph, xqcu, uny, df4fnyh,