It's under the passenger side under dash paneling. Their should be two or three screws you need to remove to get the panel down. You'll see the electrical plug going to blower motor. Remove the blower motor cover and you'll have access to blower and regulator.
The blower motor in a 1994 Mercedes-Benz E320 is located under the dashboard on the passenger side of the vehicle. To access it, you typically need to remove the glove compartment and the cover panel beneath the dashboard. The blower motor is mounted to the HVAC housing, making it accessible for replacement or repair.
Take it into the shop. It's a whole lot easier.
For my 1996 E320 I purchased a set of removal tools(2) that do removal of both radio and climate control
you access the fan blower by removing the windshield wiper motor from the outside of the car.
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From what I know the blower brushes are worn down. Easy fix just do a search for "replacing blower brushes on 85 Mercedes 300D ZaneRen
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The blower motor on a 1998 Mercedes E320 is located inside the cabin, beneath the dashboard on the passenger side. To access it, you typically need to remove the glove compartment and possibly some surrounding panels. The blower motor is mounted to the HVAC housing and is responsible for circulating air through the car's ventilation system.