Only today, my 740 GLE 1988 started like it normally does with no problem but the battery and the warning lights didn't go off after it started. It kept being on. When I accelerated to up to 60MPH or when the RPM went to 3000 RPM the lights fade away and then when the speed/ RPM go down they lights come back on again. I guess it is either the battery- which is sort of strange since the car starts with not problem from the first time- or the alternator circuitry i.e. it is not charging the battery. I think I should take out the battery and get it to Advance Auto parts to check the health of the battery and then I can isolate the alternator problem(s) later, is that the way to go or what? Thanks.