I want to move the good arm rest from my parts car into the 560SEL.

I have the seat back off but am having the darnest time turning the large bolt and I don't want to strip it. I have not got it to budge!

Is it best to keep trying with a vise grip or should I get a large enough socket (my set only goes to 11/16" or so)

By the way, does someone know the metric size of the bolt?

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1990 560SEL Anthracite Gray
1990 300SE Arctic White (parts)

It’s something like a 26 mm I can’t really remember. Just use a large crescent wrench. That’s what I used to get mine off.

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William
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1987 420 SEL - Like a fine wine only better with age

I believe it is 22mm, but it has been a while for me...

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

Thanks - I borrowed an industrial strength vise grip from work so I'll give that a try.

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1990 560SEL Anthracite Gray
1990 300SE Arctic White (parts)