I have a 190E 106000 miles and 26000 miles on a mercedes exchange transmission.
Sometimes it starts out in 2nd and drops back to 1st with some hesitation.
The adjustment at the throttle body is useless -what should I try next?

I believe your model is supposed to do that.

Depressing the throttle deeply enough will invoke a kick-dwon into first gear for a fast off the line start.

Otherwise the trans starts in 2nd for economy reasons since the engine has enough torque.

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)

a '93 should have 1st-gear start IIRC. Maybe it's time for a fluid and filter change? Either that, or a vacuum issue perhaps; I'd double-check the vacuum line from the intake manifold to the tranny 1st. If that's OK, I'd check to see if the vacuum modulator were operating properly.

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1990 190e 2.6 - The only one I can really call "My Car".

1987 190e 2.3 - The donor car's up and running, only mods are Euros and a Sony headunit. My Dad's runabout now.

1990 300e 2.6 - The parents' ride.