I just replaced mine 2 days ago
Well, it's a little hard but not that hard as you presented it. What you needed to do is:
Turn your ignition into ON position.
Move selector to N position. If you tried to do it in the P position, you are just making it hard.
Pull hand brake and block wheel
Seperate the two levers apart (male from female)
Silicone spray the bushing
Using long needle noze pliers, squeeze one side in and then work the other side
Put the snap ring and you're done
It took me 20 minutes. 5 miutes to get it out from between the heat shield and catalytic converterarea everytime it flies.
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer