I have two questions regarding my 89 420 SEL with 131k miles:
1. The transmission seems sluggish when shifting into reverse and drive. When it does shift, it is almost seems to "drop" into gear. I have changed the filter, gasket and fluid recently and didn't notice anything irregular. It did not help to solve the problem.
2. The car does not want to start right away. Once it does start, it will idle roughly for approximately a minute unless the gas peddle is depressed. Ambient temperature and engine temperature (whether the car has sat for a long or short period of time) do not seem to help or hinder this problem. I have changed the following items: spark plugs and wire set, fuel pump relay, oxygen sensor, fuel filter, distributor cap and rotor and air filters.