mexsix

Does any one have a relay diagram available? The fuse diagram doesn't show relays for whatever reason. I am just trying to work out what the relay circled in red is for (from the engine compartment fuse box)? Cheers

Plutoe

That's a very popular relay used on many models and features from mirror heating to fuel pumps----therefore post your VIN for the correct application on your VIN

mexsix

Thanks for the reply. My apologies I thought all the x166 relay diagrams would be the same.
VIN WDC1668732A231963

Plutoe

Nothing is the same on MB models\year built and that is why the VIN is always used to source parts.
In any event the circled relay in slot S and is a wiper park position heater relay and slot J is the horn relay

mexsix

Thanks mate

Artem Arestov

Also looking for the relay diagram
VIN: 4JGDF7CE3DA175337
Especially curious where the fuel pump relay located.
Your help much appreciated!

DrkNyte

I have the same issue with my 2013 GL450. Were you able to find the relay for the Fuel Pump? I keep coming across references to the Fuel Pump Module. 1st question is; does this years model have both a Fuel Pump Relay and Fuel Pump Module? 2nd question; Where are they located? please be specific with Pics as the diagram that came with the GL doesn't show any info on the relays. I know for sure the fuse is good. So it's either the Fuel Pump, Fuel Filter, Fuel Pump Relay or Fuel Pump Relay Module. I need to narrow it down but I have an engine crank and no fuel pressure. Also, with key on I do not hear any clicking for the relay or humming from the fuel pump.