The glow plug light in my 1980 300sd flashes for several seconds every time I start the engine. Even when it has been driven 100 miles or so and is up to proper operating condition.

Does this indicate that the timer is defective?

Thanks

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DCM

1977 240d
1980 300sd
1987 Chevrolet Suburban

i would guess 1 or more bad glow plugs

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1983 Euro 240D 277K
2016 Mazda 6
Coming Soon, 2013 Mercedes E350 Bluetec
Formers:
2012- Mazda 3
2007 Outlander- complete pile
1995 E300 Diesel 208K
2007 VW Passat 2.0T 63K SOLD
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2009 Lexus RX350 9061 miles. Sold 04/09
2008 Mitsubishi Lancer GTS:Totaled Sept.,09 @ 24,000
2003 Infiniti I35 58K Sold
1984 300 turbo diesel 222K

Change the front glow plug. If this fixes it cool. If not you can either test them or just change them all.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes