smartmaniacs.co.uk/forum/the-cars/fortwo-451-sept-2007-present/876256-broken-clutch-actuator

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Forum thread: Announcement

smartmaniacs.co.uk/forum/the-cars/fortwo-451-sept-2007-present/876256-broken-clutch-actuator · p. 1 · Applies to: 451, 450, 452

Source: smartmaniacs.co.uk Topic: clutch actuator failure Models discussed: 451, 450, 452 Solution status: yes

Problem: 451 Fortwo clutch actuator failed after attempt to adjust (procedure only valid for 450/452). Internal arm came loose with plastic ball socket damaged, clutch no longer functions.

Solution: Purchase a genuine Mercedes clutch actuator (not used/secondhand) and have it fitted and coded using MB Star diagnostics machine. One user confirmed success with a low-mileage used unit from eBay that was coded with diagnostics after installation, though genuine part recommended for reliability. Main cause identified as water ingress.

Key facts: - 451 clutch actuators more prone to water ingress and failure than 450 models - Adjustment procedure for clutch only works on 450 and 452 models, not 451 - Genuine Mercedes parts recommended over used eBay units for reliability guarantee - MB Star diagnostics coding required after installation of new actuator - Reported symptoms: clutch slamming when setting off or reversing, lunging between gear changes