One problem related to check engine light on has been reported for the 2008 Mercedes Benz CLS550. The most recently reported issues are listed below.
Tl the contact owns a 2008 mercedes-benz Cls550. The contact stated that at start-up the check engine warning light illuminated and remained illuminated. The vehicle was not taken to be diagnosed nor repaired. The local dealer was not contacted or informed of the failure. The manufacturer was made aware of the failure. The failure mileage was approximately 100,000.