Comparison · Reliability Ranked

Mercedes-Benz E-Class vs Porsche 911 Turbo (997)

Side-by-side reliability, price, and known-issue comparison for used-car buyers. Composite scores come from TÜV (Germany), ADAC (pan-European), NHTSA (US-sold variants), and DVSA MOT (UK inspections).

M

Mercedes-Benz E-Class

2015–2017
Reliability composite
69
/ 100
Average
ADAC + MOT + NHTSA
Estimated used price
€15,800€34,400
Documented issues
2
Tailgate rust on Estate (W211/W212)€400
Air suspension (AIRMATIC) leak / strut failure€900
⭐ Better composite reliability
P

Porsche 911 Turbo (997)

2008–2008
Reliability composite
89
/ 100
Excellent
AUTOBILD + NHTSA + WARRANTYWISE
Estimated used price
€9,800€9,800
Documented issues
3
Clutch wear (manual)€2,000
Coolant pipe failure€1,500

Bottom Line

The Porsche 911 Turbo (997) wins on composite reliability across TÜV, ADAC, NHTSA, and DVSA MOT data — typically a sign of lower ownership risk and fewer recurring failure modes at age. The other car isn't necessarily wrong; check its issue list and price-to-condition ratio before deciding.

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Reliability data tells you which model is the safer bet. A VIN history report tells you what happened to the individual car — accident and write-off records, mileage rollback, outstanding finance and theft checks.

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