TorqFix

Tensioner 103 — MERCEDES-BENZ

Tensioner 103 on Mercedes-Benz: 16 steps, engines 103.987. 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.

16 steps 1 engine code

🧭 Before you start

Fits: platform codes 300GE, G300

  • Renewed: if necessary tensioner

Don't miss

  • Until the pointer is aligned with the mark

🔧 Engine codes this applies to

103.987

📋 Procedure

  1. Loosen the bolt
  2. Loosen the nut
  3. Remove the ancillary drive belt
  4. Check the tensioner and idler pulleys; renew if necessary
  5. Tensioner:
103.987? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Type 1:
  2. Align the marks
  3. Turn the bolt to tension the belt
  4. Until the pointer reaches
  5. Fifth mark
  6. Vehicles with air conditioning:
  7. Seventh mark
  8. Type 2:
  9. Align the marks
  10. Turn the bolt to tension the belt
  11. Until the pointer is aligned with the mark

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.