File · MERCEDES-M272-BALANCE

M272 / M273 balance-shaft gear wear

Manufacturer

Mercedes-Benz

Years

2005–2010

Where people complain about this

Reddit reply — long

That sounds like the **M272 / M273 balance-shaft gear wear** issue — it's a known defect on Mercedes-Benz C300/E350/C350 from 2005–2010.

Soft balance-shaft gears wear prematurely, throwing off timing. Repair requires engine disassembly: $5K–$8K. MB extended warranty for many.

Source: Mercedes balance-shaft program; class actions filed.

If you've taken it to the dealer 2+ times for the same thing, you might have a lemon-law case. I built a free tool that checks your specific car against active class actions and NHTSA records — defectfiles.com. Takes about 60 seconds, no signup. Worst case it tells you nothing's there.

Reddit reply — short

Sounds like the M272 / M273 balance-shaft gear wear issue — well-documented defect on Mercedes-Benz 2005–2010, Mercedes balance-shaft program; class actions filed. If your dealer's tried to fix it 2+ times you may have a case. Free 60-sec check at defectfiles.com.

Driving a Mercedes-Benz C300? Run yours through the check.

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