Replaced my injectors today in the 240D (thanks Sean! ). No problems with the install, and it smoothed out the idle and ride....seems like one injector is nailing a bit though?

Anyway, there were no heat shields under the old injectors. I did some searches and all I could find were dire warnings to always replace them. What are the long-term consequences of that?

I guess that may be why I needed them replaced?

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Current Mercedes
1979 maple yellow 240D 4-speed

Gone and fondly remembered:
1980 orient red 240D 4-speed

Gone and NOT fondly remembered:
1982 Chna Blue 300TD

Other car in the stable:
2013 VW Jetta Sportwagen TDI / 6-speed MT