I think I may be the only diesel freak on here that did not know that 123's have a buzzer! Got out of church last night, went to fire the CD up and I heard this buzzing noise. I could not figure it out for a second or two cause none of the 123's I have ever owned had one that worked. Turns out it buzzes till the GP light goes off and also buzzes if the doors are opened and the key is in the ignition. The fact that it was near zero last night could have had something to do with it. I know one thing for sure, every Benz I have ever owned has had a different personality in the winter that they do in the summer. Anyone else experience this?

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2005 Accord Hybrid (Wifes)
1995 Subaru Impreza L AWD (Snow car)
1984 GMC Sierra 1500 (Mine)
1983 300CD Best $ I ever spent. (Mine)
1984 190D (sold and glad I did)
1983 300D (sold and wished I hadn't)

yup, not the glow plug light, but key in the ignition and the lights left on when door is opened.

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project

fasten your seat belt alert

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1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

Agreed. If you pay close attention when everything is working. The buzz will stop at a different time than the GP light. If it doesn't, it is pure coincidence. There is no noise associated with GP timing.

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No matter how many times you explain it to me, I'm still right.....Surf-n-Turf

its a little silver box just above your left knee. unplugging it does no harm.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.

I found the seat belt buzzer especially annoying because I like to turn on the key and then buckle my seat belt (by the time I have the door locked and the belt on, the pre-glow cycle is over and I can start the engine). I got tired of listening to the darned buzzer and disconnected its switch.

There's a two-pin plug/socket on a cable under the front of the driver's seat. It's connected to a switch in the seat belt. Unplug it and you will no longer have a seat belt buzzer but the buzzer will still work for "key in ignition" and "lights left on."

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Just unplug the seatbelt sensor. That buzzer has saved my @$$ on headlights more than once.
My other car turns out the lights for you.
-nB

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'83 300D Turbo
Current: ???K mi - 19.2mpg -> 17.4mpg -> 22.9mpg ---> ODO Died
bought at: 233.8K mi - 10MPG For $1.00
3.5 cylinders work: 320 320 100 340 280
Got insurance? FarmersReallySucks.Com

So where's the seatbelt sensor? I too like to get the glowing started soon, then buckle up and get situated.

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1985 300D, 237k.
1994 F-350, 6.9 diesel, 5 spd manual, Banks Turbo. 261k.
Sold: 1985 300CD- 267K

I can just barely hear my buzzer if it is dead quiet. Must be worn out after 22 years. I have had people tell me that my lights are on at my office because I forget to turn them off. Thank goodness I have never run my battery down.

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Doug

1987 300TD x 3
2005 E320CDI