I dont know if it matters. but it takes quite a while for the glow plug light to go out.....at least a minute. Been like that since the last time they were changed.....(about two years ago)

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87 300SDL 278,000mi - RIP
82 300SD 260,000mi - RIP
84 300D 178,000mi - SOLD
90 420SEL 178,000 - Daily Driver

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