Since date of purchase, May 2022, the electrical components have not worked properly. The solar panels have never worked, the second alternator used to only charge while driving intermittently now it doesn't work at all, and plugging into shore power sometimes melts the cord. The chassis battery frequently drains requiring constant starting or a jump. It has been replaced four times. The cabin…
2020 Mercedes-Benz Sprinter powertrain problems
severe 17 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
17
Recalls
0
Avg fix
$2,500
1crash
What stands out
Powertrain accounts for 22% of all owner complaints filed against this vehicle, across 7 categories tracked.
The failure pattern owners describe
The 2020 Sprinter powertrain has generated sustained complaints across multiple failure modes. Owners describe the vehicle shifting into Park on its own at stop lights—Mercedes initially dismissed this, then reproduced it and blamed the 'Auto P' feature, though owners could not replicate that scenario and Mercedes later issued a recall for incorrect manual instructions.
EGR system failures top the list for frequency and severity. Owners document repeated clogging requiring multiple cleanings and replacements from factory dealers. The system triggers Limp Home Mode unpredictably, cutting power to 20 mph maximum—particularly dangerous during highway merges where vehicles cannot maintain speed. One owner's air cleaner element was sucked into the intake, destroying the MAF sensor. Repairs provide only temporary relief; the condition returns within months with the computer still in failure state.
Throttle unresponsiveness occurs in two distinct scenarios. At higher altitudes (4,000–12,000 feet), engines produce inadequate power and refuse throttle input; owners document one incident stranded on a highway center line on a blind curve. A second pattern shows Drive-mode throttle loss while Neutral and Park respond normally—resolved by restart but leaving drivers stranded at remote campsites.
4WD engages or disengages involuntarily while vehicles are moving, causing grinding and transmission lockup. Power steering hose disconnects from undersized, poorly clamped fittings, causing immediate steering loss. Transmission shift modules fail, trapping vehicles in gear. Electrical systems fail chronically: solar panels, alternators, batteries (replaced four times on one vehicle), and shore power connections that melt when plugged in. One vehicle rolled away under recall investigation with manufacturer denying responsibility.
Failure modes owners describe
Unwanted Auto-Park Engagement
Vehicle shifts from Drive into Park on its own at stop lights or low speed without driver input. Dealership initially dismissed as impossible but later reproduced the condition. Owners report inability to replicate after vehicle return. Mercedes documentation references faulty ignition switch as cause in prior models; dealership blamed 'Auto P' feature activation via seat belt unbuckling, though owners could not reproduce this method and Mercedes issued recall for incorrect manual instructions on feature engagement.
When: Low speed, at stop light
Symptoms owners cite: Automatic shift to Park while driving; Occurs at low speed without driver input; Dealership able to reproduce condition; Owners unable to duplicate after return
Repairs/costs cited: Dealership diagnosed but returned vehicle with instruction to contact if issue recurs; no repair completed
Recalls/TSBs owners mention: Mercedes issued recall for driver's manuals due to incorrect Auto P feature engagement instructions; prior TSB on file for 2010 sedans citing faulty ignition switch
Repeated EGR Failure and Limp-Home Mode
EGR system clogs and malfunctions repeatedly, causing bucking, stumbling, inability to accelerate, and involuntary Limp Home Mode with severely reduced speed (20 mph max). Condition recurs within months even after cleaning/replacement. Computer remains in failure state causing sudden performance degradation without warning, particularly dangerous on highway merges and hills where vehicle cannot maintain safe speeds. One incident involved air cleaner element being sucked into intake, destroying MAF sensor with contaminants. Multiple dealer service visits documented.
When: First signs before 43,000 miles; recurring episodes at 51,871 mi (9/18/2023), 12/26/2023, 7/9/2024, 7/24/2024, 7/25/2025, and 88,340 miles
Symptoms owners cite: Engine bucking and stumbling; Inability to accelerate properly; Disabled shifting affecting braking ability; Sudden Limp Home Mode without warning; Inability to maintain safe highway speed; Unable to downshift on grades; Check Engine Light inconsistent with actual failures; Performance degradation returns immediately after repair
Codes mentioned: LI14.20-N-073867
Repairs/costs cited: Multiple EGR cleanings/replacements by Mercedes dealers; one incident required air cleaner element removal and MAF sensor replacement; repeated cleaning provides only temporary relief
Recalls/TSBs owners mention: Mercedes dealers confirmed and performed all EGR and related services; no permanent fix identified
High-Altitude Throttle Unresponsiveness and Power Loss
Engine control malfunction at higher elevations (4,000–12,000 feet) causes severe throttle unresponsiveness and inadequate power delivery. Vehicle produces only 2 psi turbo boost even on full throttle application. Problem specific to 4x4 models with OM642 diesel engine. Extremely dangerous when pulling onto highways or climbing grades; no error codes, warning lights, or diagnostic data logged. Condition resolves after vehicle shutdown and restart but recurs unpredictably. Owners report this is a well-known issue in Sprinter community with no manufacturer response.
When: At higher altitudes; first incident at 7,000 feet; occurs at 4,000–12,000 feet elevations
Symptoms owners cite: No throttle response when accelerating; Inadequate power production; Only 2 psi turbo boost on full throttle; Vehicle stranded on highway center line; Unable to climb hills; No warning messages or error codes stored; Intermittent resolution after restart
Repairs/costs cited: No repair path identified; condition persists despite engine restart, warm-up, and traction control toggling; winch assistance required in one case
Intermittent Drive-Mode Throttle Loss
Vehicle does not respond to throttle and will not move forward when placed in Drive, though throttle functions normally in Neutral, Park, and sometimes Reverse. Intermittent problem occurring primarily at higher elevations. Check Engine Light may appear during events but clears during return to sea level. Mercedes service unable to reproduce or find diagnostic data despite multiple visits. Eventually resolves after several start attempts but leaves driver stranded at remote locations with no cell service.
When: At higher altitudes (4,000–12,000 feet); last documented 10/10/2023
Symptoms owners cite: No throttle response in Drive; Throttle works in Neutral and Park; Intermittent Check Engine Light; Vehicle stuck in remote locations; Uncertain when vehicle will resume operation
Repairs/costs cited: Visited Mercedes Van Service Center 4–5 times; no diagnostics found; no repair completed
EIS Module Moisture Ingress and Shorting
Electronic Ignition System (EIS) module mounted under driver-side dashboard has electrical connector pointing upward, allowing liquids from dash cupholders and windshield condensation to drip directly into connector, causing short circuit and complete vehicle inoperability. Mercedes aware of defect and selling plastic drip bags ($20) as workaround rather than addressing root cause. Module replacement costs $1,800+. Warranty claims denied despite clear manufacturing defect (connector orientation).
When: 2019+ model years; timing varies with moisture exposure
Symptoms owners cite: Vehicle inoperable after moisture exposure; Electrical short in EIS module; Potential for repeated failures if moisture source not eliminated
Repairs/costs cited: Full EIS module replacement required at $1,800+ cost; only plastic drip bag (part A 638 546 00 35, $20) available as preventive measure
Recalls/TSBs owners mention: Mercedes refuses preventive repair; only repairs after failure; refuses to honor warranty claims; offers $20 drip bag as workaround
Electrical System Failures and Battery Drain
Multiple electrical system failures including non-functioning solar panels, failed second alternator, melting shore power cord connection, and chronically draining chassis battery requiring frequent jump-starts or replacement (replaced four times). Cabin lights flicker intermittently. Issues present since date of purchase; dealer unable to resolve after 5 months of intermittent work; manufacturer support in Alabama also failed to resolve. Owner towed to 15+ Mercedes dealers and Tiffin manufacturer without permanent fix. Vehicle frequently without power.
When: Since purchase May 2022; ongoing issues
Symptoms owners cite: Solar panels non-functional; Second alternator failure; intermittent charging; Shore power cord melting when plugged in; Chassis battery frequent drainage; Flickering cabin lights; Chronic power loss
Repairs/costs cited: Multiple service attempts across 15+ Mercedes dealers and Tiffin manufacturer; four battery replacements; multiple service trips including 2,300-mile manufacturer intervention in Alabama
4WD Engagement and Disengagement Malfunction
4WD system engages or disengages unexpectedly and involuntarily while vehicle is in motion, causing loud grinding and clanging as mechanical parts clash. System fails to respond to driver commands to engage or disengage. In one case, transmission became inoperable after unwanted 4WD disengagement occurred while parked with engine running. Vehicle required multiple power cycles and restart attempts to restore drivability. Occurs with very low mileage (under 1,000 and ~2,200 miles). Software glitch in transfer case actuator identified in at least one case.
When: Under 1,000 miles; ~2,200 miles; occurs while in motion and while parked
Symptoms owners cite: 4WD engages without driver input while moving; 4WD disengages without driver command while parked; Loud grinding and clanking during engagement/disengagement; Transmission becomes inoperable; Transfer case locks up; Vehicle refuses to re-engage 4WD when commanded; Red 4WD light illuminates unexpectedly
Repairs/costs cited: One case required transfer case actuator software update; warranty claim denied on grounds software updates not covered under powertrain warranty; owner paid out of pocket
Recalls/TSBs owners mention: Transfer case actuator software update performed at dealership; warranty claim denied for software update cost
Transmission Shift Control Module Failure
Transmission shift module fails, leaving vehicle unable to shift into Neutral, trapping driver in gear. 'Service required: do not shift gears' message appears on screen. Occurs intermittently, stranding vehicle at fuel pumps and in parking lots. At least two incidents reported on 2020 model with only 17,000 miles. Multiple dealership repairs required (Sioux Falls and Rochester, Minnesota locations mentioned).
When: 2020 model year; at 17,000 miles (or less) when incidents occurred
Symptoms owners cite: Unable to shift into Neutral; Vehicle locked in gear; Service warning message on display; Vehicle stranded at fuel pump or parking lot
Repairs/costs cited: Dealership repairs performed at Mercedes Benz Sioux Falls and Rochester Minnesota locations
Cold-Start Slow Acceleration
Vehicle accelerates very slowly upon cold start in cold temperatures and high elevations, particularly on OM642 diesel engine. Dangerous when crossing intersections or making left turns across traffic, as van moves slowly through opposing traffic lanes. Multiple documented cases in Sprinter community with same engine.
When: Cold temperatures and high elevation; upon cold start
Symptoms owners cite: Slow acceleration from cold start; Sluggish power delivery in cold and high-altitude conditions; Unsafe speed when crossing traffic
Unresponsive Throttle While Driving
Engine loses power and all throttle response while driving on highway, causing rapid uncontrolled deceleration from highway speeds to near-stopped condition. No warning lights or Check Engine Light. Occurs at random intervals. Vehicle forced to pull off roadway.
When: While driving highway at undisclosed speed
Symptoms owners cite: Complete loss of throttle response; Rapid uncontrolled deceleration; No warning lights or CEL; Random occurrence
Power Steering Hose Disconnection
Power steering hose is undersized, poorly connected, and inadequately clamped, causing it to disconnect from multiple vehicles of this model. Disconnection results in immediate loss of power steering and vehicle breakdown. Mercedes aware of issue but has not addressed it.
When: Timing varies
Symptoms owners cite: Power steering hose disconnection; Immediate loss of power steering; Vehicle immobilization
Recalls/TSBs owners mention: Mercedes aware of issue but has not addressed
Vehicle Rollaway and Brake/Transmission Issues
Vehicle rolled away on its own, causing $9,000 damage to vehicle (collision with stop sign and wall). Vehicle subject to NHTSA recall for rollaway incidents. Recall not yet complete; vehicle has been at Mercedes Benz Stockton California service facility for extended period without resolution. Manufacturer sent letter denying all responsibility and demanding owner pick up vehicle. Vehicle deemed unsafe and prone to additional incidents.
When: Timing of rollaway not specified; vehicle has been in service for 'months and months'
Symptoms owners cite: Vehicle rolled away on its own; Caused $9,000 damage from collision; Unsafe condition persists after service
Repairs/costs cited: Vehicle at Mercedes Benz Stockton CA for extended service without resolution
Recalls/TSBs owners mention: NHTSA Campaign Number 22V796000 (Powertrain); manufacturer denied responsibility in writing; advised owner to appeal
Recall Delay and Parts Unavailability
Vehicle subject to NHTSA Campaign Number 22V796000 (Powertrain); manufacturer notification received but required parts not yet available at time of complaint. Owner reports manufacturer has exceeded reasonable timeframe for recall repair.
When: Time of recall notification unknown; as of complaint date parts still unavailable
Symptoms owners cite: Unable to complete recall repair due to parts shortage
Recalls/TSBs owners mention: NHTSA Campaign Number 22V796000; parts distribution incomplete
Vehicle Jerking While Driving
Vehicle jerks while driving at undisclosed speed. Owner related failure to NHTSA Campaign Number 22V796000. Dealership inspection found no cause of failure.
When: At approximately 32,000 miles
Symptoms owners cite: Vehicle jerking while driving
Repairs/costs cited: Dealer inspection found no cause
Recalls/TSBs owners mention: NHTSA Campaign Number 22V796000 referenced
Synthesized from 17 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
The vehicle experiences complete loss of power (dead peddle) in 2 situation. both of which happen completely randomly. 1. From the start at zero miles per hour. In this situation you will start to move and then there is no power no matter how hard you press the peddle. This is very dangerous when turning into traffic. The vehicle has completely stopped running the risk of T bone…
The 2019+ Mercedes Sprinter EIS (Electronic Ignition System) module is bolted under the driver side dash board to the base of the A pillar where it meets with the firewall. The electrical connector of the module is pointing straight up - this is an issue because any liquids that might spill on the dash (dash cupholder) or any humidity from windshield interior condensation will drip right down…
Had powertrain trouble with your 2020 Mercedes-Benz Sprinter?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2020 Mercedes-Benz Sprinter?
It's a meaningful issue. 17 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Based on the 17 complaints filed, powertrain issues most often appear around 16,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2020/Mercedes-Benz/Sprinter.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.