Was hoping if anyone could tell me what should the correct contact breaker gap be on a M115 (W123 200)? The chilton book says 47-53 degree dwell but how does that translate if I want to use a feeler gauge to measure the gap? Thank you.

Set the points to 15 thou.

My specs. call for .016 , 47-53 dwell.

Fortunately for us vintage Benzheads,
a point conversion is readily available, short $$$, easy to do, and they never ran so well.
Mechanical switching has it's dis-advantages and require maintaining.
The new coversions run flawlessly.
There are both optical and Hall effect systems out there.
I personally like the Crane Cams opti units.
Less than $100. [ Formerly Allison]
www.cranecams.com.
Petronics [sp?] sells the hall effect ones.
No need to change the coil. The stock one is fine.

thanks for the info! don't think i'll be changing anything but the breaker gap though

The old Austrian bloke that started the Benz shop I work in ,Est.1964 , said, "All CB points set to 15 thou". And thats good enough for me.