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–€34,400Documented 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–€9,800Documented 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.