fuel filter

[giuseppe]

Hi, I tried changing the fuel fillter on a E220 cdi, a late 611 engine, managed to get two pipes off, and tried to unscrew the top by hand, no chance, is there a special spanner to undo the top ring. ?? cheers for any help.

 

[WG M-B]

Use an adjustable wrench and put some rag around the locking ring so it doesn't get damaged
But yes there is a special tool available