where are the headlight relays - W123
 

Hello all,
I'm a newbie to Mercedes (To*ota's are simpler :icon_evil: )
I have a 1985 230E W123. I replaced one (cracked) headlight unit (with round lamp reflectors) with a used headlight unit (with square main reflector) The connector fits, and both 'driving' lights (inner lamps with round reflectors) work - but when I turn on high beam, the new lights go on, but the other headlight goes off.
Any ideas as to how to fix would be much appreciated ...
thanks!

No such item. Power goes from headlight switch to combo switch & then to fuse box, from there to lights.

Check the fuses for power.