IllustrationFUEL TANK LEAK
2007 Mercedes Benz CLK63
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Other model years Selected year
Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 2 of 3 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Fuel/propulsion System. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
0 crash reports0 fire reports0 injury reports
What owners actually said
3 reportsMY 2007 MERCEDES CLK63 HAS FOR SOME 5 OR SO YEARS NOW SMELLED STRONGLY OF GASOLINE UPON FILLING UP. IRONICALLY THE ODOR IS STRONGEST WHILE STANDING OUTSIDE OF THE CAR ON THE DRIVER'S SIDE. THE SMELL DOES SUBSIDE AS THE FUEL LEVEL DECREASES SOMEWHAT. THE DEALER (EURO MOTORCARS BETHESDA (MD) ATTEMPTED TO REPAIR THE PROBLEM 5 OR SO…
Read full complaint
MY 2007 MERCEDES CLK63 HAS FOR SOME 5 OR SO YEARS NOW SMELLED STRONGLY OF GASOLINE UPON FILLING UP. IRONICALLY THE ODOR IS STRONGEST WHILE STANDING OUTSIDE OF THE CAR ON THE DRIVER'S SIDE. THE SMELL DOES SUBSIDE AS THE FUEL LEVEL DECREASES SOMEWHAT. THE DEALER (EURO MOTORCARS BETHESDA (MD) ATTEMPTED TO REPAIR THE PROBLEM 5 OR SO YEARS AGO BUT TO NO AVAIL (EVEN THOUGH I DID PAY FOR THE REPAIRS), THE ISSUE WAS ONLY TEMPORARILY RESOLVED. MY SERVICE ADVISOR LOOKED AT, AND PRONOUNCED MY FUEL PUMP AND GASKET AS BEING THE CULPRITS. A SEPARATE REVIEW BY A SUBSEQUENT ADVISOR SAID THE SAME. THE SMELL IS SO STRONG AS TO BE AN EMBARRASSMENT (AT LEAST) FOR WHAT IS OTHERWISE A SUPER CAR WITH ONLY 65000 MILES ON IT. AT WORST, I'M AFRAID THAT A SPARK OR SOMETHING CUD SET IT OFF (NOTE: WE PARK IT BOTH AT HOME AND AT OFFICE IN A GARAGE STRUCTURE WHERE THE SMELL, AND IT SEEMS THE DANGER, IS ONLY MAGNIFIED). I WAS MOST RECENTLY QUOTED A PRICE OF $1200 TO FIX THIS PROBLEM FOR WHAT WILL BE A 2ND TIME.
WHEN THE GAS TANK IS FILLED UP FUEL IS LEAKING FROM THE TOP OF THE TANK. AFTER THE CAR IS DRIVEN AND A FEW GALLONS OF FUEL ARE BURNED, THE SMELL IS NO LONGER NOTICEABLE. THE REPAIR FACILITY SAID THE FUEL SENDING UNIT AND NEED TO BE REPLACED.
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.