Change Car Rear Silencer Mercedes-Benz GLS
Change Car Rear Silencer
| Estimated time | 1h30 |
|---|---|
| Estimated labour cost | ~150£ |
| Difficulty | Easy |
| Remove/refit the silencer | 1h30 |
| Renew the silencer | 1h30 |
| Remove/refit the left silencer | 1h30 |
| Renew the left silencer | 1h30 |
| Remove/refit the right silencer | 1h30 |
| Renew the right silencer | 1h30 |
| Remove/refit both silencers | 1h30 |
| Renew both silencers | 1h30 |
| Repair the silencer* | 1h30 |
| Repair the front silencer* | 1h30 |
| Align the front silencer* | 0h30 |
| Repair the main silencer | 0h30 |
| Align the main silencer* | 0h30 |
| Difficult main silencer removal* | 0h30 |
| Remove/refit the rear left silencer | 1h30 |
| Renew the rear left silencer | 2h00 |
| Remove/refit the rear right silencer | 1h30 |
| Renew the rear right silencer | 2h00 |
| Remove/refit both rear silencers | 2h00 |
| Renew both rear silencers | 2h30 |
| Repair the rear silencer | 0h30 |
| Weld a sheet-metal repair panel onto the rear silencer* | 0h45 |
| Difficult rear silencer removal* | 0h30 |
| Renew the centre silencer | 2h00 |
| Remove/refit the centre silencer | 2h00 |
| Repair the main silencer* | 1h30 |
| Remove/refit the rear silencer | 1h30 |
| Renew the rear silencer | 1h30 |
| Repair the rear silencer* | 1h30 |
What is a Mercedes-Benz GLS rear silencer?
The rear silencer (also called the back box or rear muffler) reduces exhaust noise to an acceptable level. It is located at the end of the exhaust line, after the catalytic converter, particulate filter (if fitted), and sometimes an intermediate silencer.
When should you change the Mercedes-Benz GLS rear silencer?
No periodic replacement interval is specified. Carry out regular visual inspections for corrosion, holes, and deteriorated mounting rubbers. Signs that replacement is needed: louder exhaust noise, rattling from loose baffles, visible rust holes, exhaust fumes entering the cabin, or failure at the MOT/roadworthiness test.
Is it difficult to change the Mercedes-Benz GLS rear silencer?
Difficulty level 2/5: technically easy but may require effort if bolts and clamps are rusted. Key steps: raise the vehicle, apply penetrating oil to clamp bolts, remove the clamp connecting the silencer to the intermediate pipe, remove the mounting rubber hangers, fit the new silencer with new gasket/clamp, reattach mounting rubbers, check for leaks with engine running.
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