SL 55 AMG (230.474) V8-5.5L SC (113.992) (2003)
Fuel Pump Relay: Description and Operation
Fuel Pump Relay, Function
Fuel Pump Relay, Function
Shown on model 140
K27
Fuel pump relay module
The fuel pump relay (K27) is switched by a ground signal from the control unit at terminal 86. If the contact is closed, the fuel pump (M3) is
connected to terminal 30 (B+) via terminal 87. Circuit 30 is protected by a 30 A fuse.
With models 129, 140, 202, 208, the fuse is attached to the relay.
On vehicles with two fuel pumps, the pumps are connected in parallel.