Most of the Beru experience is on the older models.

On them Beru is the best available Glow Plugs. But, eve on the older Models the Berus are more expensive and there is less sellers.

Things not happening right inside of the Precombustion Chamber shorten the life fo Glow Plugs. Worn out Injector Nozzles are one of the causes also Carbon Build up.

Although someone recently pulled their plugs on a new Engine and said they were pretty clean. It is likely that the Computer Controld Fuel Injection does not carbon up like the non-computer ones do.

But there is Glow Plug Reamers for all of them to clean out the holes.

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84 300D, 82 Volvo 244Gl Diesel