Nasty surpise when cleaning a Diesel fueltank

I cleaned my Mercedes Benz 300D fuel tank and found a surprise while doing the job...

[@olavi_liikanen]

Brilliant video! I am just about to clean tank on my 1983 300D 4-speed. Thanks for insformative video! 😃👍

[@vintage76vipergreenBeetle]

Nice information.

[@kuldipdhak7972]

Very hard work done 👍

[@mikemer79]

Thanks