On the M271 Kompressor, the supercharger clutch and bearings give out at the same mileage the timing tensioner does. We do the complete service — blower and timing — in one visit at your home.
The 2005–2008 M271 Kompressor — the supercharged four-cylinder in the C200K, C230K, and SLK200K — has two aging problems that arrive on the same schedule. The supercharger's electromagnetic clutch and bearings wear out: the clutch slips instead of locking the blower in, and the bearings announce themselves with a whine that gets steadily louder. The result is boost that fades and an engine that's lost the shove the Kompressor badge promised.
At the same mileage, the timing side goes: the chain tensioner loses its ability to hold proper tension, and the chain rattles on cold start while it runs slack for the first seconds. A slack chain accelerates its own stretch and wears the guides — left long enough, it's the same jumped-timing endgame every chain engine faces, with bent valves as the closing act.
These two failures share access, share a timeline, and share a smart repair: do it all at once. Supercharger service plus chain and tensioner in one job means one teardown and a powertrain that's renewed at both of its weak points — instead of two separate repair bills six months apart for an engine that was warning you about both all along.
If your Mercedes-Benz is doing any of these, this is the likely cause:
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Both failures get more expensive with patience. A slipping supercharger clutch generates heat that finishes off the bearings, and a slack timing chain stretches itself and chews its guides with every cold start — with valve damage as the eventual stop. Two warnings at once is the engine being unusually honest with you; the cheap window is now.
Yes — both live at the front of the engine, fully accessible in a driveway. It's a long single day on site, and the car never leaves your address. Same repair a shop would do, minus the tow and the wait.
You're paying for two real repairs — a supercharger unit plus a complete timing set — and the careful hours to do both correctly. Dealers price each as a separate ticket at full rates. We quote one flat price for the complete bundle before any work starts; the overlap in access is your savings, built into the number.
You can, but the timing tensioner doesn't care about your schedule — a cold-start rattle is active wear, and the failure mode is bent valves. Since the access overlaps, deferring the timing side saves a little now and costs the full access labour again later. We'll quote both ways so you can see the difference plainly.
That's what we confirm first — a stethoscope check and clutch test at your home separates blower bearings from belt-drive noise in minutes. Pulleys and the belt get inspected as part of the job anyway. You'll know exactly what's making the noise before approving anything.
Wonderful and quick experience, charged me way less than the dealer and he did the work in my driveway in the cold. I really appreciate all the hard work. — Verified Google review · 5.0 ★
Fares came by and did the brakes on my 2021 Lexus RX350. I got quoted way more at a shop so I decided to try a mobile mechanic instead. He showed up on time, did the work in my driveway, and everything went smoothly. — Verified Google review · 5.0 ★
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