I have a slight power inconsistency and not sure where to start the
diagnosis.
When driving at normal speed and then coming to a stop at a red light
with normal breaking, the engine seems to take on an instantaneous
alternator load slowing the engine speed, and  the headlights slightly
dim. And then within a split-second all is back to normal. The
fluctuation is almost imperceptible. Any ideas, I would appreciate.
JB
1988 300E   
1999 E55