What should I do? Only area of serious rust on the car but it is really bad.... bodyshop guy recommended using fiberglass... I dont know about that though... anyone on the forum in the chicagoland area that can help me fix this?

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This panel is still available from Mercedes. I payed £42, so about $80 in the US.

I guess it depends on how long you are planning on keeping the car as to what route you take.

Cheers,
Ben

Fiberglass is what you use if you are going to sell the vehicle,,, real quick. Metal needs to be welded in for a long term repair.

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95 SL500 Smoke Silver, Parchment 64K
07 E350 4matic Station Wagon White 34K
02 E320 4Matic Silver/grey 80K
05 F150 Silver 44K

Pete, why does the fiberglass not work as well? It seems like it would be okay in a spot where structural strength is not required. Does it delaminate from the metal over time or something?

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

Just will not give the strength and rust usually reappears soon around a fiberglass/bondo repair. If there was metal there to start with, I put metal there to replace it. Those huge bubbles on bodys are usually a sign of fiberglass/bondo work.

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95 SL500 Smoke Silver, Parchment 64K
07 E350 4matic Station Wagon White 34K
02 E320 4Matic Silver/grey 80K
05 F150 Silver 44K

I agree with Pete. Cut it out and weld in a new piece. What part of Chicago are you in?