You can hot wire the the pumps by jumping the pins in the relay then see if it fails. If not, you have found the problem. I would bet money on the fuel pump relay.
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Benzmac:
Donnie Drummonds
300E
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM
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