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Mercedes-Benz CLS 450 Recall 19V605: Wiring may chafe, risking engine stall or no-restart

NHTSA campaign 19V605, reported August 16, 2019, 3,264 vehicles potentially affected.

What this recall means for you

A power wire feeding the engine coolant pump can rub against the engine fan and wear through. This can cause the coolant pump to malfunction, which may raise coolant temperatures and lead to an engine stall. Damage can also shut off the 48V on-board electrical system, so the vehicle may fail to restart after using the ECO start/stop or Glide features. Either situation can increase the risk of a crash.

The remedy is free. Dealers will inspect the coolant pump electrical line for damage, repair it if needed, and reroute it as necessary. Owners will be notified by Mercedes-Benz USA, or you can contact MBUSA customer service at 1-800-367-6372 and reference recall number 2019090019.

To check whether your vehicle is affected, look up your VIN for open recalls on NHTSA's website or through your Mercedes-Benz dealer, and schedule the repair at an authorized dealer as soon as possible.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 19V605Mercedes-Benz USA, LLC.
Component
ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING:COOLING SYSTEM
Problem
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2019 CLS 450 Coupe and CLS 450 Coupe 4MATIC vehicles equipped with 6-cylinder gasoline engines. The electrical line that supplies power to the engine coolant pump may contact the engine fan and chafe, possibly causing a malfunction of the coolant pump or a deactivation of the 48V on-board electrical system.
Risk
A malfunctioning engine coolant pump can increase coolant temperatures, possibly leading to an engine stall. Deactivation of the 48V on-board electrical system can cause the vehicle to not restart after using the ECO start/stop function or "Glide" mode. Either of these scenarios can increase the risk of a crash.
Remedy
MBUSA will notify owners, and dealers will inspect the coolant pump electrical line for damage, repairing it and rerouting it as necessary, free of charge. The recall began November 1, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019090019.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Affected vehicles

Mercedes-Benz CLS 4502019