I was starting to think that, considering the fact that he has replaced an awful lot of parts on the car. Sorry if this is a dumb question but can I do a compression test through the glow plug holes or do I need to remove the injectors? Also if I test using the injector holes, should I disable to glow plugs or wont it really matter?

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1983 240D 4spd
1984 190E 5spd
1987 300D (sitting for a year or two)
1989 Toyota Camry 5spd (current DD)