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Auxiliary belt replacement: Mercedes-Benz 3.0 CDI (642.830, 642.832, 642.834, 642.960, …)

Step-by-step auxiliary belt replacement for the Mercedes-Benz 3.0 CDI: 17 steps. What to remove, in what order, and what to check after.

Workshop procedure for MERCEDES-BENZ — the exact step sequence and torque figures, straight from real workshop data.

17 steps 5 engine codes

🧭 Before you start

Fits: platform codes 320, CDI, 4MATIC, -T, |, 350

  • Timing position: the crankshaft or camshaft is set and locked during this job
  • Special tools named: locking pin

🔧 Engine codes this applies to

642.830642.832642.834642.960642.961

📐 26 workshop diagrams for 642.830

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

Belt 642 — 642.830 · diagram 1
Belt 642 — 642.830 · diagram 2
Belt 642 — 642.830 · diagram 3
Belt 642 — 642.830 · diagram 4
Belt 642 — 642.830 · diagram 5
Belt 642 — 642.830 · diagram 6
Belt 642 — 642.830 · diagram 7
Belt 642 — 642.830 · diagram 8
+ 18 more diagrams
🔒 26 workshop diagrams for this job Ask about your Mercedes-Benz 642.830 — free or sign up free to see the drawings

📋 Procedure

  1. Refit the ancillary drive belt
  2. Remove the intercooler air duct
  3. Lock the tensioner; use a locking pin
  4. Release the tensioner
  5. Lock the tensioner; use a locking pin
  6. Remove the ancillary drive belt
Workshop diagrams

Ask TorqFix about your Mercedes-Benz 642.830 — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your Mercedes-Benz 642.830 — free → or sign up free to see the drawings

Other MERCEDES-BENZ procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.