2018 Mercedes-Benz Boxer OF

The 2018 Mercedes-Benz Sprinter (Boxer OF is not a valid Mercedes-Benz model. Assuming this is a Sprinter sold as a chassis cab for upfitting, specifically the NCV3 chassis), is a popular choice for commercial and recreational vehicle applications. It offers a blend of reliability, versatility, and Mercedes-Benz refinement. The 2018 model year offers several engine options including the 2.1L inline-4 turbo diesel (OM651) producing around 161 hp and 266 lb-ft of torque, and the 3.0L V6 turbo diesel (OM642) which puts out around 188 hp and 325 lb-ft of torque. Both engines were available with a 7-speed automatic transmission (7G-Tronic). Owners often praise the Sprinter’s spacious cargo area, comfortable ride (especially with upgraded suspension), and relatively fuel-efficient diesel engines. Common complaints often revolve around maintenance costs, some electrical quirks, and the initial purchase price compared to other vans in its class.

Engine

2.1L Inline-4 Turbo Diesel (OM651)

• Injector Failure
  • Description/Symptoms: Rough running, misfires, excessive smoke, fuel leaks.
  • Solution: Replace faulty injector(s). Recoding the injectors to the ECU is often necessary.
  • Estimated Cost to Fix: $400 - $800+ per injector (depending on location and labor rates)
  • Recalls: None Found
• Timing Chain Issues
  • Description/Symptoms: Rattling noise from the engine, especially on startup. Can lead to engine damage if not addressed.
  • Solution: Replace the timing chain, tensioner, and guides.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found

3.0L V6 Turbo Diesel (OM642)

• Oil Cooler Leaks
  • Description/Symptoms: Oil leaks, often pooling in the valley of the engine. Can lead to low oil levels and potential engine damage.
  • Solution: Replace the oil cooler seals or the entire oil cooler assembly.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found
• Swirl Motor Failure
  • Description/Symptoms: Check engine light, limp mode, poor performance.
  • Solution: Replace the swirl motor or intake manifold assembly.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Transmission

7-Speed Automatic (7G-Tronic)

• Torque Converter Issues
  • Description/Symptoms: Shuddering during acceleration, especially at lower speeds. Can feel like a vibration or hesitation.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $1500 - $3500+
  • Recalls: None Found
• Valve Body Problems
  • Description/Symptoms: Harsh shifting, delayed engagement, slipping between gears.
  • Solution: Replace or rebuild the valve body.
  • Estimated Cost to Fix: $800 - $2500+
  • Recalls: None Found

Suspension

• Leaf Spring Sagging/Breakage (Especially on heavily loaded vehicles)
  • Description/Symptoms: Vehicle sits lower on one side, poor ride quality, potential for broken leaf springs.
  • Solution: Replace leaf springs. Consider upgrading to heavier-duty springs for vehicles with constant heavy loads.
  • Estimated Cost to Fix: $500 - $1500+ per side
  • Recalls: None Found
• Shock Absorber Failure
  • Description/Symptoms: Bouncy ride, poor handling, excessive body roll.
  • Solution: Replace shock absorbers.
  • Estimated Cost to Fix: $200 - $800+ for a pair
  • Recalls: None Found

Electrical

• Glow Plug Issues
  • Description/Symptoms: Hard starting in cold weather, check engine light.
  • Solution: Replace faulty glow plug(s) and potentially the glow plug control module.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failures
  • Description/Symptoms: Various electrical malfunctions, including lighting issues, power window problems, and sensor failures.
  • Solution: Replace or reprogram the SAM unit.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found
• Wiring Harness Problems
  • Description/Symptoms: Intermittent electrical issues, often caused by chafing or corrosion of wiring.
  • Solution: Repair or replace damaged wiring harness sections.
  • Estimated Cost to Fix: Highly variable, depending on the extent of the damage. $200 - $2000+
  • Recalls: None Found

Exterior

• Sliding Door Issues
  • Description/Symptoms: Difficulty opening or closing, sticking, or unusual noises.
  • Solution: Adjust the door alignment, lubricate the rollers and tracks, or replace worn rollers or latches.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Interior

• HVAC Blower Motor Failure
  • Description/Symptoms: No air blowing from the vents, weak airflow, or unusual noises from the blower motor.
  • Solution: Replace the blower motor.
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found
• Sprinter Van Seat Swivel Base Failures
  • Description/Symptoms: Seat swivel base jams or is not able to swivel.
  • Solution: Lubricate the swivel point, or replace the entire swivel base assembly
  • Estimated Cost to Fix: $50 - $300
  • Recalls: None Found

Summary

The 2018 Mercedes-Benz Sprinter, while generally reliable, can experience a range of issues. Engine problems, particularly with the OM651 and OM642 diesel engines, can be costly to repair. Transmission issues, electrical gremlins related to the SAM and wiring, and suspension wear are also common concerns. The severity of these issues ranges from minor inconveniences to potentially expensive repairs. Prospective buyers should be aware of these potential problems and factor them into their purchase decision, as well as ensuring a thorough pre-purchase inspection by a qualified mechanic familiar with Sprinter vans.