reamed the gp holes did a continuity c/k of the wires every thing in spec .
did replace the relay (Monark PN#090290012) and glow plugs (monark pn#090506039)at the same time . the relay comes on for 30 sec. then when the motor starts they come back on for 3 min then off like advertised for the new up grade relay .
just went out side and put the bosch plugs back in every thing seams to be good for now .
tested the monark plugs with a battery jump box
2 of the plugs were just dead
and 2 were shorted so that the base (were the threads are )heated up and
not the electrode and the plastic isolators were melted
and 1 was good
Just think that they are junk gp
time to see if
Mercedes source will make good on this or if I'm SOL
Thanks for the replies so far
where to buy the beru gp?