I just replaced the blower motor on my 95 E320, so I assume you have the same one.

The motor can be installed backwards or, if the motor was replaced at some point and the same "fan cages" were used, they could have been installed backwards.

Can't think of anyway to physically check it without taking off the cover which requires taking off a bunch of other stuff...the motor is located underneath the windshield wiper.

"The blower regulator permits a continuous blower speed regulation. The blower regulator is connected to the main fuse box and ground and is supplied with battery voltage as soon as the ignition has been switched on. In addition, the blower regulator is connected to the automatic climate control unit by means of a control cable. Depending on the function selection of the blower switch, the control unit continuously sends a control voltage of between 0.4 to 9 volt to the blower regulator. The regulator continuously supplies a current between 2.0 to 28 amps to the blower motor, in this way regulating the blower speed."

Unfortunately the blower motor regulator is also located under the motor cover, so no way to check it without taking off the cover.

AH