Since we had our a.c worked on, the fuel gauge will at times fall below 1/8(?) of a tank )with plenty of gas in the tank) and cause the low fuel warning light to come on. It happened again awhile ago and there is about 3/4 of a tank in it now. What should I look for?? Thanks!!

Fuel tank sending unit, $173 at ********


http://www.**********.com/search/product.aspx?sid=rrvkde2m4ud03enapylfzin0&makeid=800016@Mercedes&modelid=1356364@E320&year=1999&cid=22@Fuel%20%26%20Air%20System&gid=3331@Fuel%20Tank%20Sender%20(For%20Gas%20Gauge)

Easily accessible from inside the trunk!