Steel Disc Source For Fuel Tank Repair - PeachParts Mercedes-Benz Forum

David Wilson · #1 02-24-2018, 12:20 PM

Quote:

Originally Posted by tjts1

With the 90L tank I've done over 900 miles on a fill up. The low fuel warning comes on at 2.5 gallons and that gives me another 100 miles on the highway. In my 87 300D/5spd/90L LA to SF to LA at 75mph is easy. Also from my experience the real usable capacity of the tank is closer to 95L.

I was wondering how the low fuel light would work with this tank. Looks like the same sending unit is used in both tanks. Car gets 31mpg with no load @ 75mph. 28 with moderate load, 26 when sagging in the rear (4 persons with luggage) 95L would be sweet! I assumed the tank volume was exactly as listed.

tjts1 · #2 02-24-2018, 01:01 PM

Quote:

Originally Posted by David Wilson

I was wondering how the low fuel light would work with this tank. Looks like the same sending unit is used in both tanks. Car gets 31mpg with no load @ 75mph. 28 with moderate load, 26 when sagging in the rear (4 persons with luggage) 95L would be sweet! I assumed the tank volume was exactly as listed.

The 90L diesel tank is internally identical to the 90L tank fitted to the 500E. Since the fuel consumption on the 500E is much higher they fitted a shorter fuel sender so the low fuel warning would turn on earlier. I fitted my 70L sender in the 90L tank because it was in better condition but it is indeed identical.

Diesel tends to foam a lot while filling so when the pump clicks off, wait 10 sec and restart the pump. You'll get another gallon in at least. Also the tank is designed with about 20% air space at the top for gasoline fumes which diesel fuel doesn't have. The interior volume is closer to 110L with about 95L usable.
70L to 90L W124 fuel tank swap pics