Hello, I recently bought a 1986 560SEL, and was wondering how hard it is to change out the front lower ball-joints, and the rear 'air cells' accumulators for the Hydramat suspension. I have a small service center (that works on mostly older american cars and trucks) so I have been able to do all of my mechanical service and repairs (Valve Cover Gaskets, Trans Filter and Fluid, Oil Change, Plugs and Wires) so I am hoping that I can do these services as well. Also I have no blower in any speeds

, so I assume that the Blower Motor is shot. I ordered the MB Service CD's and it doesn't appear to be too hard to replace, but I have heard that some of the W-126 chassis had an inline fuse installed to circumvent the OE in the fuse box. And my radio system has had a Sony CD Headunit installed by the previous owner, and every few months it seems to blow a fuse. Should I replace the 8 Amp with something stronger?
Thanks, Dave