I have an issue that just started today.

77 240D Automatic.

Suddenly, while driving down the road, a buzzing noise started coming from the center console. Like, an electronic buzzing. However, it stops when either the blinker or the hazards are on. What in the WORLD could that be?

Thanks,
ElcaBob

I'd say its the flasher switch/device going bad. I've never experienced it but that makes sense to me.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Do you have a cell charger in the cig lighter?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Sounds like a relay on its way out...had something similar in the CCU on the 84 300D I owned.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 156k miles
06 E320 CDI "Rutherford", Black on Tan, 173k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 143k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 67k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

a capacitor failure in the flasher switch can also mess up the flashing frequency. mine was way too fast after the cap(s) went out. however, that lit up the blinkers, and it's not clear if the same is happening here.

unplug the hazard switch and see if it stops.

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'77 240D, 504H, OM617.952, etc.

Thanks, all. I'll pull the switch and see.