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If its a diesel then that's your answer. I have a 1983 240D and that's normal for that engine. Any old diesel does the same thing.

My volkswagon diesel with 235,000 miles on it smokes on startup in the following conditions:

1. Below 10 degrees F (-10 C or so).2. Above that temperature if I do not run my glow plugs for the standard 7 seconds.

Above freezing, if I run my glow plugs it starts first cylinder and does not smoke. If I start it without glow plugs, however, it belches black smoke for five or ten seconds.

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โˆ™ 2011-09-13 17:13:16
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Q: Why would a 1973 Mercedes 280 smoke a great deal at start up only?
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