Cleaning w124 wagon fuel tank

[ah-kay]

I dropped the tank and try to clean it. Reason is that car stalls with about 8 gallons left. Removed and cleaned the tank filter but to no avail. Never had been so frustrated. There is NO lowest point that I can drain the tank. The drain has a circular baffle round it. Can't get to it from any openings. Pressure washed it but I doubted I reached where all the crud are. Anyway, it is better. I fill it with 2 g of water and 1g drains out from the outlet. So there is 1g of residual fuel when the tank is "empty". Much better than before. Has anyone opened one up and see how the baffles are arranged? 1g left in tank acceptable?

I think the w123 wagon tank should be similar.

[Sugar Bear]

Did you encounter enough gunk to believe that is the problem? Is there an intake sock in the pump? If not it could be a blocked vent causing the symptom.

A gallon remaining in the tank sounds normal.

Sorry I can't answer your question, just able to give some ideas from experience.

Good luck!!!

[Zulfiqar]

All the gunk collects in that dome - and once you remove the strainer that is screwed into the tank, you can fashion a coat hanger into a bent hook and scrape that gunk out.

At least this is how I cleaned my W124 tank the best, And because I owned a sedan, removing the tank took a grand total of 15 minutes to do a full blown steam wash.