Checking air mass meters

Hello together.
so after about 4 years my fat guy let me down for the first time.
What happened?
I drove about 15km car parked (without any problems).
After about 30min. between 400 and 1000 rpm.And Pesch smokes black from the exhaust, and that's not a little.
Then I drove home gently.With constant gas,the troublesome lrun almost out of the car, too, accelerates when braking.
What did I do?
Signaling device Lambda deducted = no change
Euro 2 Conversion decompressed = no change
spark plug plugs pulled separately = no change
LLRV cleaned (but was clean) sometimes connected to the power supply ,wave runs freely = no change
Spark plugs all Black Verrust!

Then I removed the cable from the air mass meter when the engine was running and see that round engine run no more sooty smoke.

Can I assume that the air mass meter is defective?
Is it possible to control it.What values do I have to read and how do I proceed?
According to ETOS of 2006 the part costs without fairy tale tax 335€.Isn't it just without.And then to switch to suspicion?

Here's another question.
Can one tell me the part number of the temperature generator sitting on the passenger side below the distributor.The donor where the Euro 2 conversion is also clamped.
At ETOS only find thermoswitch 1 035 919 369M there is something of two pole and white.
He's a polig, and I mean yellow.

Ps : Is there one in Cologne and the surrounding area who can read the error memory?
Had called the ADAC once, they couldn't read out."Unfortunately, the car was too old.

Thank you for your help!
Wishing another beautiful Sunday
Greetings Daniel