What's the buzzing from under the glove box w124 diesel?

[isobars]

Hi All,

I've a 91 300d which is a real pig to start and was begining to think it had something to do with a buzzing noise that I heard from under the glove-box when I turned the ignition.

The hum starts on key-turn, then after about twenty seconds makes a clicking sound and turns into an angry buzz.

The glow-plug light goes off after about five seconds. The car simply fails to explode into life.

My suspicions of the buzz might now be unfounded. This morning I bought another 124 300d ( Estate, 292,000 miles, sweet sound, drives perfectly, great oil pressure) which buzzes merrily, but starts first time.

Could anyone tell me what that puzzling noise is, please?

Cheers,

Paul

 

[andy27168]

Hi,
I don,t have much specific knowledge on a 124 but on a 202 there is a small fan in the overhead console, which draws air over a sensor for information for the cars heater, these can whine and buzz, i believe the 124 has a similar fan but its in the area of the passenger footwell, glovebox. I,d be willing to bet this is what your buzzing is.

 

[isobars]

'pinn'eck Andy,

That's incredible! They think of everything!

Cheers,

Paul