Gas gauge only goes to 3/4 and after 100miles an empty alarm comes on ??? on 2001 Mercedes-Benz C320

I find only 5 gallons fills the tank again....Any thoughts...??

by in Oroville, WA on April 03, 2013
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2 answers
ANSWER by , April 03, 2013
sender from tank not working. could be sticking or cracked. but not working. have to change it.
ANSWER by , April 03, 2013
Fuel level sender (Gas level float) has failed and needs replaced.