Originally Posted by joeck76
im sure this has been discussed but ive been searching and nothings come up, everything ive found has been incorrect, i have a 1990 190e 2.6 model and im trying to remove the fuel pump relay so i can relieve fuel pressure. the problem is there doesnt seem to be a relay, haynes puts it by the main fuse box ??? removed all relays and nothing, than i read this board and it says its behind the battery, i remove the dead wall and theres no relay, just a switch with 1 10a fuse in it and 2 computers nothing else? has anyone else had trouble finding fuel pump relay? i need to get this done today so that i can pull gas tank and replace it
Looking at the Summer/Fall 2005 catalog# 45M from Peformance Products (www.performanceproducts4benz.com
) page 180 which shows the location of the "Fuel Pump Relay", for all the 190 models they are all located behind the battery, however this is what it states (where 2C is the location of the part in the diagram):
2C - fuel pump relay 190E 2.3 to '84 with manual trans 54-085 $124.00
2C - fuel pump relay 190E 2.3 to '84 with auto trans 54-086 $128.00
2C - fuel pump relay 190E 2.3 from '85 to '86 54-083 $142.00
2C - fuel pump relay 190E 2.3 from '87 to '93 54-130 $125.00
2C - fuel pump relay 190E 2.6 to '89 54-157 $113.00
2C - MAS Control Unit 190E from '90 54-317 $425.00
In other words it looks like they changed the design of the relay and made it a MAS unit (computer) for '90 190E 2.6 and above.
Note the parts numbers above are Performance Products part number and not MB part numbers.
Hope this helps. It you want to just remove pressure do not drive the car for 24 hours and in a safe place just remove the fuel line from the pump.