I own a 86 420SL (Type107) European Model.
I have a similar problem with a sticking throttle. It appears only when the car is hot and parked for some minutes. The pedal is hard to depress for the first time only. The throttle linkage is very well lubricated.
Best regards from Germany ...
[This message has been edited by michael_vogt (edited 06-29-2000).]