Mercedes® Glow Plug, Loop-Pin Type, Diesel, 1960-1983

If you are replacing one or two glow plugs because they are bad, you should consider replacing all of them since the others are the same age as the ones that failed. Before installing new glow plugs, the glow plug holes must be reamed out and the resultant carbon must be blown out of the cylinders to eliminate shorting out the new plugs.
Additional Fitment Data:
1977-1983 240D Manual Transmission thru engine #121328
1978-1981 300CD thru engine #085945
1977-1981 300D thru engine #085945
1979-1980 300TD thru engine #085945