1980 300SD - RMP guage not working all the time - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 09-22-2009, 03:58 PM Thread Starter
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1980 300SD - RMP guage not working all the time

Hi, Guys... new to this ... Diesel world... and MB Diesel... and LOVE IT !!!
Here is what I have. I just got one 80 300SD with 85K on it.... Interior PERFECT.. Car was seating under cover for 10yrs.. it works perfect, drives very nice...
Problem: RPM guage does not start after you start the engine, but after 5-10 min it works just fine. And any time after that first initial start for the rest of the day... it works...

Suggestions, pls. how to fix it or what to replace ?

THanks
Keram
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post #2 of 4 (permalink) Old 09-24-2009, 01:07 PM
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Bad sending unit. Look under the hood for the screw-on cap on the driver's side top of fender. That's my guess.
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post #3 of 4 (permalink) Old 09-24-2009, 06:59 PM Thread Starter
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Thank you ... will check the sending unit

Thanks... I know... I think.. the trash can looking switch ? I will replace it.

Thanks
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post #4 of 4 (permalink) Old 09-24-2009, 07:52 PM
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^ Yes, black, cylindrical...

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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