2017 Mercedes-Benz C350e

The 2017 Mercedes-Benz C350e is a plug-in hybrid variant of the popular C-Class sedan. It combines a 2.0-liter turbocharged four-cylinder engine with an electric motor, producing a combined output of 275 horsepower and 443 lb-ft of torque. Other C-Class engine options for 2017 included turbocharged 2.0-liter inline-4, a 3.0-liter V6, and a 4.0-liter V8. It has a 7-speed automatic transmission. Owners generally appreciate the C350e’s blend of fuel efficiency, performance, and luxury. However, some common dislikes include the limited electric driving range and potential for increased maintenance costs associated with hybrid technology.

Electric Motor

No Issues Found

Battery/Hybrid System

• Reduced Electric Range
  • Description/Symptoms: Significantly lower electric driving range than the EPA estimate (around 20 miles when new). Gradual degradation of battery capacity over time, leading to even shorter electric ranges.
  • Solution: Battery diagnostics and, if necessary, battery cell replacement or full battery pack replacement. In some cases, software updates can improve battery management and range.
  • Estimated Cost to Fix: $2,000 - $10,000+ (depending on severity and component replaced)
  • Recalls: None Found
• Hybrid System Malfunction Warning Light
  • Description/Symptoms: Illumination of the hybrid system malfunction warning light on the dashboard. Can be accompanied by reduced power, rough idling, or difficulty starting. Diagnostic codes related to the high-voltage battery, electric motor, or hybrid control module are often present.
  • Solution: Diagnosis of the specific fault code(s) and repair or replacement of the affected component. This could include the high-voltage battery, electric motor, hybrid control module, or related sensors and wiring.
  • Estimated Cost to Fix: $100 - $5000+ (depending on the source of the warning light)
  • Recalls: None Found

Transmission

7G-TRONIC PLUS (7-Speed Automatic)

• Rough Shifting
  • Description/Symptoms: Harsh or jerky shifts, especially between certain gears. Can be more noticeable when the transmission is cold.
  • Solution: Fluid change with genuine Mercedes-Benz transmission fluid. In more severe cases, valve body replacement or transmission rebuild may be necessary.
  • Estimated Cost to Fix: $300 - $4,000+
  • Recalls: None Found
• Torque Converter Issues
  • Description/Symptoms: Shuddering or vibration at low speeds, especially during acceleration.
  • Solution: Torque converter replacement.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Suspension

• Air Suspension Failure (if equipped)
  • Description/Symptoms: Vehicle sagging on one or more corners, ride height control malfunctions, or error messages related to the air suspension system.
  • Solution: Diagnosis of the air suspension system, including checking for leaks in the air struts, lines, or compressor. Replacement of faulty air struts, compressor, or ride height sensors.
  • Estimated Cost to Fix: $800 - $2,500+ per strut (depending on location and labor)
  • Recalls: None Found

Electrical

• COMAND System Issues
  • Description/Symptoms: Freezing, crashing, or slow response of the COMAND infotainment system. Bluetooth connectivity problems, navigation errors, or issues with the display screen.
  • Solution: Software update for the COMAND system. In some cases, replacement of the COMAND head unit may be necessary.
  • Estimated Cost to Fix: $100 - $1,500+
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Malfunctions in various sensors (e.g., parking sensors, blind spot monitoring sensors).
  • Solution: Diagnosis and replacement of the faulty sensor.
  • Estimated Cost to Fix: $200 - $800+ per sensor
  • Recalls: None Found
• Keyless Entry/Start Problems
  • Description/Symptoms: Intermittent or complete failure of the keyless entry and start system. Difficulty unlocking or starting the vehicle, even with a new key fob battery.
  • Solution: Diagnosis of the keyless entry system, including checking the key fob, door handle sensors, and vehicle’s receiver module. Replacement of faulty components or reprogramming of the key fob.
  • Estimated Cost to Fix: $150 - $700+
  • Recalls: None Found

Exterior

• Panoramic Sunroof Issues (if equipped)
  • Description/Symptoms: Cracking or breaking. Can be extremely expensive to replace.
  • Solution: Replacement of the sunroof glass.
  • Estimated Cost to Fix: $2,000+
  • Recalls: None Found

Interior

• Center Console Creaking/Rattling
  • Description/Symptoms: Annoying creaking or rattling noises coming from the center console area, especially when driving on rough roads.
  • Solution: Tightening loose fasteners, adding felt or foam padding to eliminate contact points between panels, or replacing damaged trim pieces.
  • Estimated Cost to Fix: $50 - $500+ (depending on the complexity of the repair)
  • Recalls: None Found

Summary

The 2017 Mercedes-Benz C350e, while offering a compelling blend of efficiency and performance, is subject to several common issues. The most prevalent concern the hybrid system, particularly battery degradation leading to reduced electric range. Electrical issues with the COMAND system and various sensors can also arise. Suspension problems, especially with the air suspension (if equipped), can be costly. Transmission issues such as rough shifting also occur. While some issues are relatively minor and inexpensive to resolve, others can be significant and require extensive repairs. Before buying the vehicle, have it inspected by a certified Mercedes-Benz mechanic.