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me = engine module the esp = traction module and the k40 relay fuse box is in there
Inspect k40 relay board and replace it if the soldered joints at top right of board are defective or resolder them. Please see: Link
In the engine compartment in the control module box. This is the little area by the right hood hinge that contains the control module. It is the K40/4 relay. Hope this helps.
under the hood on drivers side. take off cover to fuse box and the area closest to the passenger side has a cover with I believe four screws. the K40 relay is in there.
The relay is located in the right front of the engine compartment passengers side. There will be a black cover, release the 2 slide clips and remove the cover for access.The designation for the relay is K40/7ko.If your looking in at the relays from the passengers side of the engine compartment it should be the 4th relay from the left, once you pull the relay off it will have a designation under it. It should read O.The fuse is in the same compartment. It's the first 40amp large orange fuse next to the 60amp large fuse. Check with ohm meter because the fuse is hard to determine if blown by the eye.
Actually not all E class 9r especially E320 like mine has a fuel pump relay in the fuse box under rear passenger side seat. Mine actually is part of the K40 fuse/relay box under passenger side of hood near the firewall
Often the MAF sensor needs replacing, or possibly the coil packs, leads, spark plugs, K40 relay board (re-solder or replace), oil contaminated wiring, O2 sensor or crank angle sensor, disintegrated vacuum hoses, loose hoses, other.
The K40 will not work as a marine band antenna, as it is "cut" (optimised) for 26-30Mhz. The Marine Band of frequencies is usually found 156-174Mhz.
K means calcium carbonate filler and the 40 means 40% calcium carbonate.
K-39 is the most abundant, constituting about 93 % of the atoms in naturally occurring potassium.
The closest match in my (rather old) reference is K40, with a half life of 1.248x109 years. But precision was lacking in the question.
Radioactive decay in the inner core of k40 U238 and Th232 cause the earths internal heat plus lithostatic pressure (pressure of the overlying rocks).