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3 Posts
Discussion Starter #1
Fuel pumps run unles the battery is disconnected
Tank is pressurized until gas cap is removed
New pumps and filter replacement didnt fix issue
Wheres the accumulator on this model
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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22,126 Posts
I love that model.
Going to move the thread to the W124 section.
There is an amazing amount of members and knowledge shared there.
 

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Premium Member
2014 G550, 2000 SL500, 1995 E320 Cabriolet, 1980 TR8
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1,230 Posts
Fuel pump relay (K27) fault (the contacts in the may be stuck closed)
ECU (N3/1) fault
Base Module (N16/1) fault.
 

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Premium Member
2014 G550, 2000 SL500, 1995 E320 Cabriolet, 1980 TR8
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1,230 Posts
Relay under rear seat? How would I test that
What's this ecu and base model stuff
Yes, I believe that on the V8 it is located under the seat. You could test for continuity on the contacts with an ohmmeter, but I believe the relay has some electronic circuitry in it, so just checking continuity may not be totally reliable. Replacement is the most reliable test. If you pull the relay, the pumps should stop running. If so, to me, the relay is the most likely cause.
 
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