smart center removed and replaced complete cylinder head due to misfiring caused by burned valve seats on #2 cylinder. This would have been a $2K repair if smart USA had not covered most of the cost, even though the car was out of warranty.
The oil developed a leak along the pan rail where the oil pan is bolted to the engine. To effect this repair, the oil pan was replaced.
Radio, Lights, other electrics worked. Engine would not turn over. Starter did not spin. Neutral sensor defective. Sensor replaced.
Transmission would not engage when car started and gear shift moved to drive or reverse. Required multiple re-starts, and occasionally a 10-20 minute "rest" before it would engage. Required software upgrade which dealer conveniently had.
Leaking oil. Oil gasket defective. Replaced under warranty.
Electric cooling fan (behind the condenser) started to fail. The bearing failed causing a rattling noise as the fan blades contacted the housing.
check engine light
car had two burned valves, loss of compression in cylinders 2 &3. Mercedes corporate paid all but $500 to replace the head with a new one.
Muffler flex connector broke
Check engine light
Low compression in cyl 1 = valve job. Engine still runs a little rough on occasion AFTER the $5500 valve job. And the wrench symbol still pops up on the dash. But likely an electrical symptom.
Oxygen Sensor and Sender Unit replaced
blown head gasket. replaced head gasket, thermostat and AC control unit
Oil leak caused by faulty valve gasket. Gasket was replaced at no charge.
Overheated, bad head gasket. Replace head gasket, mill head, replace/grind & seat valves, replace water pump.
Fuel pump failed
air intake system cracked. Instead of replacing, use a bicycle tire to patch the hose
Did not investigate past check engine light. My code reader indicated a secondary air fault, something I had fixed before by dealership.
Blowing oil splatter on the back when driving for long trips and engine is hot...Car smokes after stopping..
Check Engine Light kept coming on even after I cleared the fault with my Scanguage. Dealer ordered and installed a seal.
Replacement of timing case cover and replacement of the start/stop mechanism
The oil pan gasket was leaking and had to be replaced. This is a common problem on the 2009s. Was fixed completely under the original warranty.
Oil pan was leaking at seal The oil pan was leaking. Dealer had to order special sealer which required another trip after they received it.
I had to pay $38.00 for new oil and filter, otherwise they would have reused the old oil.
Motor mount bolts broken. the timing cover had to be removed from the car and sent out to a local machine shop to have the
broken bolts removed and helicoils installed. They did that because of the cost of a new cover and to save time. Dealer removed timing cover and could not get gasket to seal. Attempted repair with engine in car, ruined three gaskets. After 31 days it was fixed.
Fix lasted about a month before gasket leaked oil again. This time removed engine from car for better access to timing cover gasket.
Car rated at 5.8 litres/100km. I am getting 9.8/100km. I have repeatedly brought this issue to Mercedes Benz Dealer (Barrie, On) to no avail.
Flex pipe repair
They checked everything out, and updated the computer module. There was a $120 charge for checking out the system. There was no cost for the update, nor for a full inspection.
Exhaust gasket between converter and muffler
Oil Pan Gasket was Leaking , all was done under Warranty
sometimes would not go into reverse and sometimes would not go into park
fuel pump @42psi new plugs and filters and still will not run. Tries to start but just wont kick.
Throttle valve was jammed shut and needed to be replaced. $2000.00 just for the valve. M.B. (Cadilac $500.00)
broken pipe needed complete exhaust system
Outside temp sensor failed. Was replaced. Unclear if repair successful. CEL came back on afterwards, the went back off. Need cold weather to test.
Muffler flex pipe was broken. Loose and melting back bumper. Muffler was replaced. Muffler flex pipe was broken. Loose and melting back bumper. Muffler was replaced.
Check engine light went on. Onboard computer diagnosed it. Took it to a non-Smart dealer who ordered then installed the part- an emissions control valve. Replaced defective emissions control valve.
Took car to dealership service dept. to get maintenance reminder reset after doing an oil & filter change in addition to changing the transmission oil. I could not get the reminder to reset using several suggested methods.
Car was intermittantly throwing a P0410 code. The cel light was coming on more frequently. The secondary air valve was replaced and the computer reset. Concern appears to be resolved.
I could move the gear selector but the transmission would not select a gear and would beep. Moving forward in Drive (when it worked) would fix problem temporarily. Car fine after clutch reflash.
Muffler failed. Secondary air injection pump replaced.
Replaced leaking valve gasket allowed oil to pool around spark plugs.
Caused electrical malfunction.
The car shut itself off in hard left turns 3 times.
Oil pan gasket leaking. Replaced
cylinder head replaced due to worn valve guides leaky oil pan
Used 6 quarts of oil in 2 weeks, replaced the entire short block.
Wiring harness for O2 sensor chafing on hose from air pump. Wrapped harness in electrical tape, then ziptied a rubber hose around the harness to prevent further chafing.
shift module replaced
Transmission and battery upgrade.
Check engine light come off. They reset it. It didn't it come back
Engine light came on. Found it to have two faulty sensors. We chose not to repair. Estimated repair cost was $500
Broken flex-tube. Replaced by welding in an after market one. Rest of exhaust and cat is in good condition.
Exhaust flex tube. Welded in replacement
engine light on,checked for vacuum leaks and reset fuel settings
Smart 2.0 software upgrade - enhance transmission to work like the 2009 transmission.
Water in gas
Exhaust system broken flex pipe. Dealer wanted to replace the whole system, got my mechanic to replace the flex for a small fraction of the price.
fuel pump fuse blew, stranding me, on 3 occasions. Dealer easter egged it, selling me $559 fuel pump. Fuse blew again. Tested my old fuel pump, under head pressure, for over an hour at 14vdc. Pump refunded. Pinched wire-factory defect.
Secondary air valve replaced.
Cooling system leaked crank shaft position sensor failed
Engine light error #po410 replaced part no more problems. 2.0 update reprogrammed transmission, replaced battery.
Secondary air valve bad.
Reset the engine light. Not a problem.
code p0442 - leak in evaporator emissions system
replace purge valve.
new transmission mount needed
Motor stopped as I was driving. Was able to restart immediately, after pulling over. Dealer found nothing wrong and no reason for the incident.
check engine light stayed on - required replacing emissions sensor on engine
check engine light came on, dealer checked error code, related to a sensor that failed not covered under warranty, paid for parts ($48) and labor; in an out in about 1.5 hours, this car is serviced by MBenz dealer so labor rates are higher
Engine light came on and was an emission valve. Repaired the next morning.
replaced failed purge valve
muffler and tail pipe replacement
Check engine light came on due to faulty secondary air system switch over valve.
Error P0410 - Replaced Secondary Air Injection Valve.
Oxygen sensors clogged. Replaced engine air filter. The one I had installed was too dense.
Engine light came on and stayed on.
Check engine light, code P0455. "O" Ring on gas cap was misaligned. Once it was aligned, code cleared.
Replaced Air injection module.
Fuel mixture rich, determined two intake gaskets needed replacement
Sensors indicated excessive rich fuel mixture. This is a repeat of the earlier repair issue which was corrected initially but then returned after a month. The dealer corrected the issue again at no charge. Probably had to remove and reinstall gasket.
Gear shift stuck. Upgraded to 2.0, lubed shifter.
Secondary air injection valve faulty. P0410
Failed crank position sensor. Car rendered totally useless.
Dealer replaced the secondary air injection valve.
Alternator drive belt shredded which destroyed the oil pressure sending unit and an emission control line.
secondary air injection valve malfunction
Routine 10,000 mile service. They also did the Smart 2.0 upgrade - transmission reflash, new more powerful battery, shifter lube and gave out the new, updated owner's manual.
replace cracked motor mount
Check engine light came on. Diagnosed as faulty switch over valve, which was replaced.
Needed a new fuel plug
The alternator belt snapped. This caused the heating pump to stop, too. Smart Roadside told me that driving was fine, but a few miles later, I'd fried the engine :(
The check engine light came on. Owner's manual said not to drive it. The problem was a bad switch over valve. Valve ordered.
It was a repair for the check engine light that had come on previously. This visit was previously reported. A sensor had caused the problem and dealer replaced it on this visit.
Car was in shop for trans. upgrade, etc offered for 2008 models. Engine's computer was destroyed when tech attempted trans. upgrade. Engine computer replaced by Dealer in about 24 hrs. Rental car provided.
Check engine light came on and took the car to dealer. Issue was engine sensor and made car run sort of rough. Resolved with new sensor.
Secondary air pump replaced. Took car to shop when check engine light came on.
Reflash of transmission shifting software, termed smart 2.0. This makes the transmission shift points different and allows changing to the paddle shifters from auto mode by pulling on the shifter.
P0430 code shown on ScanGuage. Dealer replaced Secondary Air Injection Solenoid. P0410 code shown on ScanGauge. Dealer replaced Secondary Air Injection Solenoid.
faulty gas cap
gas cap cracked, got new one installed by self.
needed a muffler assembly due to break in connecting metal hose leading to carburetor, probably from bad pot holes on NJ roads shaking car a lot.
engine seized would have cost more than value of car to repair
Air injection valve replaced.
Airflow valve was sticking. This has been a common problem with the Smart4two cars.
Intermittent clutch engagement problem. Did software update, and is OK so far.
Check Engine Light X2 Codes failed O2 Lambda sensors. Necessitated removal of rear muffler box to remove by welding torch flame sensors seized into threads, due to no anti seize compound applied at time of manufacture/assembly.
check engine light came on. code=p0445-p0457. inspection of gas cap indicated gasket distorted. replaced gas cap.
Flex tube between exhaust manifold and muffler broke. Had new piece welded in place of failed part.
Sometimes could not switch gear into D or R. Dealership said they had about ten cars more this year with the same behavior. Updating the firmware should fix the problem which after driving a few thousand miles seems it did.
Engine runs on two out of three cylinders. I keep it for now because I can still drive it around town as long as the engine stays relatively cool.
replaced main computer and throttle body! replaced throtle body
Engine rattle at low speeds.
Small oil leak.
One of the individual accelerator position sensors was occasionally delivering a bad signal for at least long enough to throw a CEL and send it into limp-home mode. I replaced the accelerator myself.
Lower motor mount bolt became loose, caused a ckunking noise when car shifted gears. Tightened bolt.
Replaced secondary air injection pump. Pump bearing was starting to fail resulting in a loud jet engine sound upon initial startup. replaced with a used pump acquired from an SCOA member.
Cost of replacement pump $70.00. labor was aprox 1.5.
Had a "Maintenance Due" icon showup on the dash. Stopped into the dealership and the service manager did a quick reflash and removed the icon. No other issues before or since.
OE exhaust broke at the 'flex joint' - unable to replair. Replaced with an aftermarket unit (an upgrade).
OBD II code PO401. Faulty secondary air intake sensor.
Car towed to Riverside Smart dealer 06/28/08, returned 07/21/08, after replacing gas gauge float. Part delivery took over two weeks.