Help! What controls the timing on a 560 SEL? How do I advust it? Mine is at 30 and I can't get it to TDC by rotating the dist. A timing lite is showing 30 degrees advance at idol (~800RPM) on my 90 560SEL. It smoothly advances to ~40 degrees as the engine revs. Moving (rotating) the distributor doesn't change the the timing more than a degree or two. Car seems to run fine and the emissions are all very low. It passes smog, but the timing is too high.