OK so tell us how you do it. I was a factory trained MB mechanic myself 25 years ago when these cars were still in production. Rally Motors Roslyn NY.
But I haven't changed a set of standard 107 mounts in about 9 years. The cut down Allen wrench is all I can recall.
Very easy. Instead of trying to raise the engine, you
lower the sub frame.
Unbolt the caliper and hang it. Remove the 2 lower
Shock nuts, loosen the sway bar link to the last few threads.
On the lift I use 2 spin jacks but on the ground you
can use a floor jack under the control arm and support
the engine with a bottle jack.
Remve the 10mm bottom bolt, then the 2 15mm
sub frame bolts and lower it down to where you want it.
Enough room for any tool combination.
Mount comes out the side, through the wheel well.
This is also how I replace the A6 compressor.
If you want more room unbolt the sway bar link completely.
If you need to do the subfraame mounts nows the time.
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