Recall 19V605 affects 3,264 2019 Mercedes-Benz Cls 450 vehicles for coolant-pump wiring damage. Repair is free at any franchised Mercedes-Benz dealer.
Mercedes-Benz is recalling 3,264 2019 Cls 450 Coupe vehicles because the electrical line that powers the engine coolant pump can rub against the engine fan and chafe. The problem can raise coolant temperatures, lead to an engine stall, or keep the vehicle from restarting after ECO start/stop or Glide mode; Mercedes-Benz dealers will complete the recall repair free of charge.
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What's wrong?
The 2019 Mercedes-Benz Cls 450 uses an electrical line to supply power to the engine coolant pump. The coolant pump moves coolant through the engine so heat can be carried away, while the nearby engine fan pulls air through the cooling system when the engine needs extra cooling.
On affected Cls 450 vehicles, the line for the coolant pump was routed with enough variation that it can touch the engine fan. The spinning fan can rub through the wiring harness, damage the electrical supply, and cause the coolant pump to malfunction or shut down the 48V on-board electrical system.
An owner can see a warning message in the instrument cluster before the problem becomes obvious. The message can report engine coolant temperature that is too high, a malfunction of the 48V on-board electrical system, or both.
Who's affected?
Both listed components apply to the same 2019 Cls 450 scope: wiring and the cooling system.
| 2019 Mercedes-Benz Cls 450 | wiring |
|---|---|
| 2019 Mercedes-Benz Cls 450 | Cooling system |
| Units affected | 3,264 |
| Field incidents | NHTSA has logged 2 field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific car.
What's the safety risk?
A malfunctioning engine coolant pump can raise coolant temperature and lead to an engine stall. A 48V system deactivation can also leave the vehicle unable to restart after ECO start/stop or Glide mode. Treat high coolant temperature or 48V warning messages as a reason to schedule service soon. Repair is free at any franchised Mercedes-Benz dealer.
What should I do?
- Check your VIN to confirm your 2019 Mercedes-Benz Cls 450 is included in this recall.
- Contact a franchised Mercedes-Benz dealer to schedule the free inspection, repair, and rerouting of the coolant-pump electrical line that can chafe against the engine fan.
- Bring the recall notice if Mercedes-Benz mailed one. If not, reference recall number 19V605 when you call.
- Drive cautiously until the repair is complete, and stop in a safe place if coolant temperatures rise or the engine stalls.
What happens at the repair
At the dealer, a Mercedes-Benz technician inspects the coolant pump electrical line for damage, repairs any damaged wiring, and reroutes the line so it does not contact the engine fan. The recall repair is free, with parts and labor covered. Out-of-pocket repairs already paid are handled through the new vehicle warranty, not through a separate reimbursement program, because all involved vehicles remain covered under that warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| August 16, 2019 | NHTSA published the recall |
|---|---|
| August 23, 2019 | Dealer notification began |
| August 23, 2019 | Dealer notification ended |
| October 4, 2019 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| October 4, 2019 | Interim owner notification (was planned for this date) |
| November 1, 2019 | Owner notification mailed |
Frequently asked questions
What is recall 19V605?
Recall 19V605 covers 3,264 2019 Mercedes-Benz Cls 450 vehicles with a coolant pump electrical line that can contact the engine fan and chafe. Mercedes-Benz dealers will inspect the line, repair damage, and reroute it as needed for free.
What should I do if my 2019 Mercedes-Benz Cls 450 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 19V605. If it is, contact a franchised Mercedes-Benz dealer to schedule the coolant pump electrical line inspection and repair. Reference recall number 19V605 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost. Mercedes-Benz dealers will inspect the coolant pump electrical line, repair any damage, and reroute the line as needed free of charge.
What is the safety risk?
The safety risk is an engine stall or a no-restart condition after ECO start/stop or Glide mode. The defect involves the electrical line for the engine coolant pump, which can chafe against the engine fan and affect cooling or the 48V electrical system.
What if I bought my Mercedes-Benz Cls 450 used?
The free recall repair still applies. Recall coverage follows the vehicle, not the first owner. Check your VIN to confirm whether your specific Cls 450 is included, then call a franchised Mercedes-Benz dealer and reference recall number 19V605.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/19V605000 |
|---|---|
| Mercedes-Benz customer service | 1-800-367-6372 |
| NHTSA recall # | 19V605 |
| NHTSA recall # (full) | 19V605000 |
Source documents
-
Download Misc. Document (PDF) - Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →