I got 2 off but just rounded the nuts off 2 stubborn bolts. I'm bracing the front bolt head with a socket on a breaker bar and a pipe extension to the ground while hammering on the other end of an open end wrench at the nut. There's no space at the differential to fit a socket on the rear side of the disc. I think the rubber disc is also dampening the blows. I used PB Blaster penetrating oil too.

These discs were replace a year ago on my 87 300E so I suspect the mechanic over-torqued and possibly applied red loctite to the nuts. I'm removing the engine because the car was rear ended.

I'm nearly to the point of getting out my Dremel tool to cut the nuts off to bolts. Not comfortable creating sparks with the close proximity to the fuel pump and all the encrusted oil...

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'88 300TE, 175k, black RENNTech 3.6L Recaro C's AMG 1 SOLD
'92 500E, 110k, Spruce green, stock SOLD
'94 E320 Cabriolet, 130k, E500 wheels, Emerald green SOLD
'94 E320 Cabriolet, 110k, black, stock, SOLD
'88 300TE, 229k, dark grey, SOLD
'90 300CE, 212k, white, new paint, SOLD
'91 300E, 209k, white, rebuilt head SOLD
'74 914-6, grey, 2.7L 325hp twin turbo Audi conversion