can anyone tell me where the transmission control moduel is located in a 1989 300se?

Transmission on that car is 100% mechanical....no computer control.

In fact MB didn't use electronic transmissions until 1996 in the USA.

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thanx for reply and info,,my sons 300se is not shifting into high gear...then shut it off and restart and it works flawless.took it to a tranny shop,guy drove it for 3 days no problem,,i drove it home 20 miles mixed city highway and it drove perfect..my son takes it out that nite,,perfect..next day problem back..no slipping just shift problem...any ideas....i have a twin 300se in my yard for parts that has rod knock and tranny shifts good...thanx for any help

I bought a low mileage 1990 300SEL this spring that was in beautiful condition, but had no service records. I had the car for less then 2000 miles, and was in the process of catching up on some regular PM work when the transmission suddenly refused to up-shift. First I felt sick, then I decided to do a transmission fluid and filter change, as that was on my list anyway. Well, I changed the fluid, which was at the correct fill level and kind of dark, and the filter. It corrected my problem. Apparently the filter was clogged enough to restrict fluid pressure causing the no up-shift. As I said, the fluid was at the correct level, and I’ve seen worse as far as the color goes, but that filter was in bad shape. Maybe you’ll get as lucky as I was.
Good luck

i usually dont have luc like that.ill drop the pan and look.the car has 100k.i got it cheap so whatever i have to do is well worth it.thanx for reply.