'97 E300D: Which blower regulator to buy

[jessie_eaton]

I have reviewed numerous posts on this subject and has been very helpful, but I still have questions.

My blower only works in low and medium speeds. I don't think it's the pushbutton controller because the blower speed does not increase when defrost is selected.

I went to this sites online catalog and it says I have to buy the blower with the regulator.

Question #1) Is this true? Or can I just buy the regulator?

Question #2) I was given a choice of two different regulators. Does anyone know the part number I need?

Dr. Diesel had the following quote (different model Mercedes though) from a previous post to make sure the blower was OK:

"... LEAVE THE KEY AND SYSTEM ON, DISCONNECT THE BLUE GND LEAD AT THE MOTOR FROM THE REG. CONNECT A JUMPER WIRE TO THE MOTOR TERMINAL AND GROUND THE MOTOR DIRECTLY TO CHASSIS. IF BLOWER RUNS FULL SPEED, REPLACE
THE REGULATOR. ..."

Question #3) can I run it like this as long as I would like or will bypassing the blower regulator damage the blower motor?

IT'S VERY HOT DOWN HERE IN MOBILE, AL.

Thanks guys. Can't wait till Mercedes finally gets some darn literature for my car. It's tough trying to figure this stuff out without a manual.