Used Car Expert Fault Guides tell you the common Mercedes S Class faults and wear items that can become problems and big bills for their owner.
Independent research indicated that using our fault guides to check a car before you buy it can save you an average of £300 in surprise bills and hidden problems.
That's because our Mercedes S Class fault guides are written so that anyone can understand them – even if you know nothing about cars and have no tools. For every common fault, we tell you what to look for, what it means and what it costs.
Select your Mercedes S Class fault guide:
Mercedes S-Class (1991 - 1999) Fault Guide
Mercedes S-Class (1999 - 2005) Fault Guide
Mercedes S-Class (1991 - 1999) Fault Guide
We know of 11 MERCEDES S-Class (1991 - 1999) faults which our fault check guide makes it easy for you to spot and avoid.
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4 engine faults
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2 suspension wear items or faults
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2 interior problems
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1 bodywork issues
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2 recalls
Here's an example fault on the MERCEDES S-Class (1991 - 1999)
What to look for:
Check all the edges of the engine for oil weeping out and running down the side. In particular look at the front corner of the engine.
What it means:
Oil leaks in this area mean the head gasket needs replacing.
What to do
Negotiate a £1,117 discount or have the repair completed.
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Mercedes S-Class (1999 - 2005) Fault Guide
We know of 18 MERCEDES S-Class (1999 - 2005) faults which our fault check guide makes it easy for you to spot and avoid.
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4 engine faults
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5 suspension wear items or faults
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5 interior problems
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2 bodywork issues
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2 recalls
Here's an example fault on the MERCEDES S-Class (1999 - 2005)
What to look for:
Test drive the car. Listen for a loud rattling from underneath the car, coming from the exhaust area. This is more likely from 60,000 to 100,000 miles.
What it means:
This rattling could be caused by the breakup of the catalytic converters. The filters inside the ‘cats’ can disintegrate. The debris from this can be sucked into the cylinders via the Exhaust Gas Re-circulation valves. This can destroy the engine, meaning a re-build or a new engine is necessary.
What to do
If you hear this sound – be wary. A new engine can cost £5000+. If you suspect this problem, have the inspected by a professional mechanic.
Register to have full access to the MERCEDES S-Class (1999 - 2005) fault guide.
Registered users also get access to our regional price guides, cars for sale email alerts, and many other benefits to help you buy a safe, reliable used car at a great price.