I have not been able to find this relay. I have a 1986 300SDL the had a battery short and I have lost several things and have had threads suggesting that as a problem. Sure would appreciate any help.

Looks like this: http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1CL0O6GWD1EM0R5BXV&year=1986&make=MB&model=300-SDL-001&category=P&part=Overload+Relay

On my 124 it is behind the battery under a loose cover. Not exactly sure on your 126.

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-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html

Believe it's between the double firewall about in the middle, maybe more towards the battery.
Gilly

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In my 86 SDL it's rear of the engine compartment, between the brake master cylinder and the engine. The red top makes it obvious.

Best Regards,
Jim

I appreciate the information. I had no idea what to look for. There are so many different safty items, guess I should break down and buy the CD so I can find these things, just don't have many problems though.

Found mine last night in the fuse box- a new fuse in it cured my tach not working and the ABS light always on. '85 SD