I was just trying to add a little humor, OK? Still, I don't like guys who use too much force and break stuff like locks/keys. Maybe he's a perfect angel otherwise.

Back to your problem. You can try three things imho:

1. Pull that trunk cord under the rear seat.
2. I was going to say get into the trunk by removing the back seat but I don't think that works on a Benz. So I only have two ideas after all.
3. Lube the heck out of that lock and try everything again. I know locksmiths that hate graphite. They all seem to hate WD-40. Silicone lube or molybdenum sulfart seem to be two spray lubes that locksmiths don't mind using.

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__________________
Thx/Reno
An American in France
88 300TD 5spd Sportline (lowered factory susp) - totalled by a flying deer
89 Range Rover V8 - the 4wd beast
02 Toyota minivan
05 Peugeot Partner 4x4 Dangel
88 International Harvestor 633SA
--Gone but not forgotten:
1970 250/8 C (sold to buy 450 SLC)
1972 450 SLC (sold after battling wiring harness problems too long)
1971 300 SEL 6.3 (sold after destroying two *very* expensive rear LS diffs)
1986 560 SEL (now my little brother's pride and joy)