M104.981 Water pump replacement
 

Hey All.
I'm in the process of replacing the water pump on my 1991 300SL-24 (M104.98x)
I was able to remove 3 out the 4 mounting screws that hold the pump.
I CANT GET TO THE UPPER REAR SCREW WITH MY 13MM SWIVEL 3/8 SOCKET.
Any tips to remove that specific bolt?

Thanks

https://ibb.co/kqvnmH


https://ibb.co/msQnmH


https://ibb.co/dfCNLc


https://ibb.co/eAU2Lc


https://ibb.co/eiYJtx


https://ibb.co/ijJjYx


https://ibb.co/i22YRH

This is my 7 year-old write up, with pics, for my M104 water pump at the time. Perhaps it an help:

http://www.peachparts.com/shopforum/tech-help/295118-m104-95e320-water-pump-dry-run.html