Most common 2001 Mercedes-Benz C320 problems
Share of the 63 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz C320 complaints by model year
Best C320 years: 2004, 2005, 2003. Years to avoid: 2002, 2001. Compare all years →
2001 Mercedes-Benz C320 recalls (3)
Visibility › Sun/moon roof assembly
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please see the recall report for a complete list of models and model years. The glass sunroof panel may not be properly secured and can detach.
Remedy: Dealers will inspect and replace the sunroof panel as necessary, free of charge. Owner notification letters were mailed January 10, 2025. Owners may contact MBUSA customer service at 1-800-367-6372.
Visibility › Sun/moon roof assembly
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The glass sunroof panel may not be properly secured and may detach.
Remedy: Dealers will inspect and replace the sunroof panel as necessary free of charge. Owner notification letters were mailed February 3, 2023. Owners may contact MBUSA customer service at 1-800-367-6372.
Visibility › Sun/moon roof assembly
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2001-2011 vehicles. The bonding between the glass panel and the sliding roof frame may deteriorate, possibly resulting in the glass panel detaching from the vehicle. For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V918-4126.pdf
Remedy: MBUSA will notify owners, and dealers will inspect the glass panel bonding and replace the sliding roof, as necessary, free of charge. The recall began July 10, 2020.
What 2001 Mercedes-Benz C320 owners say
Electrical system all 26 →
I just bought the car and two days later the Smart key won't turn, can't unlock the steering wheel and the shiffter the good think the car was parked on my drive way call tow truck take to the shop and they say I need a new key and ignition control module but only dealer can do that, $1,400.00 dollars job
Intermittent horn - 2001 Mercedes Benz C320 I turn to you for any help and/or advice you can provide. While on an interstate driving my horn goes off. It was humorous at first as I thought it was someone else. The horn sounded constantly for about 15 minutes then went off for the next hour whenever it felt like it. No error codes were displayed on the console. No horn problem the next day. Gave the wife the car she drives to work - no problem. Get off from work, into the car, starts it up....the horn goes off again. Not humorous anymore, the wife did not find it funny. Took the car to the dealer, valley motors, inc, cockeysville, maryland the next morning waited 5 hours and was told they could not duplicate the problem. But charged me $90 in labor. Started the car to run an errand....horn goes off! Drive directly to the dealer. …
Seats
Tl* the contact owns a 2001 Mercedes Benz C320. The contact stated that the battery malfunctioned. The vehicle was towed to an independent mechanic. The technician diagnosed that the driver and passenger seat control modules needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The VIN was not available. The approximate failure mileage was 130,000.
My 2001 Mercedes-Benz C320's battery was constantly going bad and having to be jumped after not starting it or driving it for approx. 24 hours. Finally, after a certified Mercedes mechanic investigated the problem, he informed me that the problem originated from the driver's seat module, which was draining my battery. He informed me that if I unplugged it for the time being, my battery would no longer drain. Sure enough, after unplugging the seat module, I no longer had issues with my battery draining. The seat module controls seat adjustments as well as steering wheel adjustments, so this is very inconvenient, and unsafe, because there are times, when I have to plug the module in adjust my seat or steering wheel, and it does not work, and I'm stuck with the seats or steering wheel in an uncomfortable position. …
Engine & cooling
Malfunctioning seat control modules drain battery in 2001 C320 Mercedes Benz. Not long after purchasing the car in January 2008 with 51,000+ miles, I paid $175 dollars for a new mbz battery, before asking dealership to disconnect seat control modules. I was not prepared to pay $1200 to replace modules. June 25, 2010, my 2001 C320 stopped during a trip to phoenix, az from california, due to fuel pump going out. My 79 year-old mother and I waited in 100+ degree weather for a tow, which took 3 hours to get to phoenix mbz dealership. Oakland service rep never suggested replacing, although the car was serviced during the suggested mileage for replacement. The phoenix dealership initially replaced original fuel filter, and never thought to check if original fuel pump needed replacing. …
Tl contact owns a 2001 Mercedes Benz C320. While driving approximately 20 MPH on normal road conditions, the engine stalled without warning. The engine warning indicator remained illuminated on the instrument panel until the engine was turned off. The vehicle restarted after several attempts and was taken to the authorized dealer for diagnostic testing. The technician stated that the failure was related to the engine control module (ECM). The vehicle was repaired according to the service warranty. In addition, when the outside temperatures exceeded 100 degrees, the vehicle would shutter. When the vehicle has been parked for a couple of days, the electrical system rapidly drains the battery. On three separate occasions, the vehicle was taken to an authorized dealer for identical failures without resolutions. The vehicle has not been repaired. …
2001 Mercedes-Benz C320 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.2L 6-cyl | 5-speed automatic | RWD | 17 / 23 / 19 |
EPA ratings. Class: Compact car.
Frequently asked questions
Is the 2001 Mercedes-Benz C320 a good car?
Based on 63 owner complaints filed with NHTSA, the 2001 C320 rates avoid: 3.6× as many complaints as a typical year of the C320 at the same age. It is one of the C320 years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2001 Mercedes-Benz C320?
The electrical system — 26 complaints, 41% of all complaints for this model year, most often about ignition › switch. Next are the seats (19) and engine & cooling (12).
How many recalls does the 2001 Mercedes-Benz C320 have?
There are 3 recalls for the 2001 Mercedes-Benz C320, the most recent from November 19, 2024 (sun/moon roof assembly). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Mercedes-Benz C320?
The best years by complaints, compared at the same age, are 2004, 2005 and 2003. Years to avoid or approach with caution: 2002 and 2001. See the full Mercedes-Benz C320 years comparison.
At what mileage do 2001 Mercedes-Benz C320 problems happen?
The median mileage reported in complaints is about 70,000 miles; 25% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.