This morning on my way to work, suddenly, a loud buzzing started. It seemed to be coming from behind the gauge cluster, plus my gauges were all jumping all over the place - especially the fuel and temp gauges.

I pulled over immediately, and as I slowed, the buzz got slower and quieter too. I stopped and shut the car off to check it out...nothing I could see gave me any indication of what was happening. I started it back up, and no buzz the remainder of my drive (~20 minutes).

Tonight, when I started my car to come home (in the dark), the entire right side of my gauge cluster is dark (the tach, if I can remember right).

In reading through old posts, it seems like this might be a faulty relay, or potentially, a bad (or going bad) fuse.

Is there a way to test said relay(s)? Other thoughts?

TIA...

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1984 300D: 275,000 miles (soon to be for sale)

In search of my 1987 300D in anything but white.

The first thing that comes to mind is that one of the small light bulbs that provide dash illumination has come loose and is rattling around. I would pull the cluster (easy), disassemble (also easy), and see what's up.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

There is no way this is a rattle...it scared the poo out of me. Very loud, a very distinct buzzing.

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1984 300D: 275,000 miles (soon to be for sale)

In search of my 1987 300D in anything but white.

I don't know of anything electric in the cluster itself that would buzz, but I would start by pulling it out and taking a look at the speedometer (because the buzz was related to speed). I once had a plastic gear in the speedo fail and make quite a bit of noise.

It's a fuse... number 5 or 6 I think.

My car had exact same issue as described. Blown fuse, replaced with a good one, problem gone away and has stayed away.

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Cheers!
Scott McPhee

1987 300D