Use only a factory pump. I have seen the aftermarket pumps fail quickly with much damage...and the core is no good.
If you aren't a tech, take it to one for this. If you are, have fun... This is a good job. Book time is 4.8 hours. I can do it right in under 1.5.
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM