Could someone assist, please?
Where is my E55 Fuel Pump Relay for the 2003 S211 E55 AMG Estate?
The dual fuel pumps have failed; the vehicle cranks but does not start.
My multimeter indicates that there is no power to the pumps when the ignition is activated and the engine is turning.
The vehicle commenced operation immediately and functions when direct current is supplied to the wiring of one pump located beneath the offside rear seat - RED/YELLOW wire and BROWN wire!
I have located what appears to be the fuse labelled '90' - refer to the attached image. The top is broken off, yet it remains fully intact and operational, exhibiting no indications of damage or overheating. However, the location of the relay is unclear.
I assume that both the relay and the connector may be damaged.
The fuse and relay diagram provided with the vehicle, located behind the driver's dashboard side panel, indicates that fuse F04 (20A) in the rear N/S SAM and fuse bankābehind the left-hand boot side panelāis associated with Relay 'A', the first from the bottom. However, I have discovered that this information is inaccurate; fuse F04 and the small Relay 'A' are designated for the intercooler pump in E55 AMG models.
Some owners in the US indicate that the fuse and relay are located behind the right-hand side panel of the trunk; however, this appears to apply solely to sedan vehicles, not station waggons.
The internet and AI are fraught with inaccuracies.
I appreciate your assistance in advance.