Hey CL Fam... I just recently replaced my master clutch cylinder and slave cylinder on my SC300's W58....I installed it into my car and everything was working fine and shifted smoothly with no problems. Then 3 days later while driving to school, It began to lose pressure and now I cant put it into gear when the car is on. When I push down on the clutch pedal, it isn't as stiff as when i first installed the new master and slave cylinder. I would also have to bring the clutch pedal back up manually because it wouldn't come back up all the way on its own. I tried bleeding it several times and still the same issue. I had replaced the clutch slave cylinder again with a new one and still low pressure and wont go into gear. I tried using my old master and slave cylinders and still the same issue. I never abused this car and it has never given me any problems until now. Any advice from the Gurus would help so much!! Here's the beast.LOL

 

Well, if clutch master cylinder and slave are good, and you have no leaks, then most likely your issue lies in your bellhousing. There are not that many components to the entire setup so finding the issue is pretty straight forward. My guess if the fork and attachments are good would be the pressure plate/t/o bearing.

 

Also check your clutch lines, Ive had a smiliar issue when my rubber hose was collapsed. Replaced with steel braided line and voila. Good luck

 

This is most likely your problem^^

 

It has to be i dont see anything else that it could be any update?