Well, I confirmed that my glow relay is bad. I swapped out the glow relay from a family member's 300SD. Theirs worked great in their car as well as mine.... Sort of.

Mine is an original part, their is a replacement BERU brand glow relay.

In removing their relay 3 of the pins on the big plug snapped off. Under the thick metal pin is a tiny connection to the internals of that relay. Not a sturdy design.

So, now I'm out two relays.

Anyone want to make a deal? I've seen the price of relays vary greatly online from $30 to $150 for a new one.

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This area is typically used to brag about one's current or former automobiles.

What's the part number on your relay?

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1974 240D 3.0L 4(M) - 250K -OM617.910 + 300D FW + Rajay turbo power!
1977 6.9 3(A) - 84k

sent you a PM

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K

W123.133 300D
and
W126.120 300SD
1981 - 1985

Diesel Glow Plug Relay
MB# 001 545 98 32





Have a great day.

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ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/