4500 mi	update software for fuel tank capacity. Replace gas tank and fuel sensor.
7200 mi	Final failed attempt to correct fuel tank capacity issue.

18000 mi

Replaced fuel tank due to misreading fuel gauge. Covered under Smart Warranty.

28000 mi

CEL. Code pointed to gas cap issue. Reset

36000 mi US $2000

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.

16000 mi US $650

car died on highway. fuel pump fuse. told fuel pump about to die needed new one !!!

41000 mi US $200

Electric cooling fan (behind the condenser) started to fail. The bearing failed causing a rattling noise as the fan blades contacted the housing.

16000 mi US $288

emissions valve stuck open

18000 mi

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.

33000 mi US $136	check engine light
33000 mi US $500	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.

5600 mi	Radio, Lights, other electrics worked. Engine would not turn over. Starter did not spin. Neutral sensor defective. Sensor replaced.
8000 mi US $73	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.

49000 mi US $850	Fuel pump failed
102000 mi US $500	air intake system cracked. Instead of replacing, use a bicycle tire to patch the hose

55000 mi US $650

Exhaust system. Muffler failed.

22200 mi €800

Replacement of timing case cover and replacement of the start/stop mechanism

Check Engine Light kept coming on even after I cleared the fault with my Scanguage. Dealer ordered and installed a seal.

35000 mi US $600

Muffler flex connector broke

10000 mi

Leaking oil. Oil gasket defective. Replaced under warranty.

49000 mi US $700

AND engine mount

39000 mi US $1296	Oxygen Sensor and Sender Unit replaced
44000 mi US $5000	blown head gasket. replaced head gasket, thermostat and AC control unit
45000 mi	Oil leak caused by faulty valve gasket. Gasket was replaced at no charge.

80000 mi US $400

oil pan replacement, just got old

68000 mi US $2956

Also while there, engine head gasket and spark plugs replaced, with oil change. There may have been more, but I can't place my hands on the shop report. The primary issue was lack of reliable A/C.

7000 mi

Blowing oil splatter on the back when driving for long trips and engine is hot...Car smokes after stopping..

58000 mi US $5500

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.

52000 mi US $2500

Overheated, bad head gasket. Replace head gasket, mill head, replace/grind & seat valves, replace water pump.

33000 mi US $1

Check engine light

75000 mi

Did not investigate past check engine light. My code reader indicated a secondary air fault, something I had fixed before by dealership.

17000 mi

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.

8000 mi US $38	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.
45000 mi US $540	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.
46800 mi	Fix lasted about a month before gasket leaked oil again. This time removed engine from car for better access to timing cover gasket.
98000 mi	Overheated engine.

9700 mi

Oil Pan Gasket was Leaking , all was done under Warranty

21080 mi C $500	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.
27280 mi C $250	Flex pipe repair
31000 mi C $120	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.
31620 mi C $710	Exhaust gasket between converter and muffler

19840 mi	gasket on fuel cap replaced
25420 mi	sometimes would not go into reverse and sometimes would not go into park
58900 mi	fuel pump @42psi new plugs and filters and still will not run. Tries to start but just wont kick.
59400 mi C $2700	Throttle valve was jammed shut and needed to be replaced. $2000.00 just for the valve. M.B. (Cadilac $500.00)
62000 mi C $300	broken pipe needed complete exhaust system

33580 mi C $209	Outside temp sensor failed. Was replaced. Unclear if repair successful. CEL came back on afterwards, the went back off. Need cold weather to test.
34720 mi C $503	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.

96300 mi US $2000

Replaced leaking valve gasket allowed oil to pool around spark plugs. Caused electrical malfunction.

22700 mi US $602	Neutral sensor defective
75000 mi US $150	Coil Replacement

2000 mi

The car shut itself off in hard left turns 3 times.

22000 mi US $30

Secondary air valve replaced.

18700 mi US $580

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.

31000 mi US $100

Oil pan gasket leaking. Replaced

86131 mi	Check engine light come off. They reset it. It didn't it come back
88000 mi US $300	Engine light came on. Found it to have two faulty O2 sensors. We chose not to fix it because they told us it affected the O2 mix and would have a mild affect on gas mileage but nothing else. We found this to be accurate and chose not to fix it. Estimated repair cost was $500
94000 mi	The car would not start and the heater blower stopped working. Car was towed in to the dealership. They were unable to repeat the issues for 7 days. Took the car home. Car and blower worked.

22000 mi

Transmission and battery upgrade.

5000 mi	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.
16000 mi US $100	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.

1000 mi

shift module replaced

48360 mi C $170	Broken flex-tube. Replaced by welding in an after market one. Rest of exhaust and cat is in good condition.
64440 mi C $120	Exhaust flex tube. Welded in replacement

89560 mi C $200

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.

93000 mi US $124

engine light on,checked for vacuum leaks and reset fuel settings

49800 mi US $3000	cylinder head replaced due to worn valve guides leaky oil pan
50000 mi US $50	Used 6 quarts of oil in 2 weeks, replaced the entire short block.
56000 mi	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.

19000 mi

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.

1000 mi

Motor stopped as I was driving. Was able to restart immediately, after pulling over. Dealer found nothing wrong and no reason for the incident.

9000 mi	check engine light stayed on - required replacing emissions sensor on engine
12500 mi US $256	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

42000 mi

Cooling system leaked  crank shaft position sensor failed

10000 mi

Engine light error #po410 replaced part no more problems. 2.0 update reprogrammed transmission, replaced battery.

7000 mi	SOFTWARE UPDATE
40000 mi US $35	Secondary air valve bad.

3000 mi

Error P0410 - Replaced Secondary Air Injection Valve.

3000 mi

Check engine light came on due to faulty secondary air system switch over valve.

10000 mi US $202	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.
56000 mi US $350	replace cracked motor mount

7300 mi US $130

secondary air injection valve malfunction

Engine light came on and was an emission valve. Repaired the next morning.

10000 mi US $277	replaced failed purge valve
14300 mi US $393	muffler and tail pipe replacement

	Reset the engine light. Not a problem.
27000 mi US $355	code p0442 - leak in evaporator emissions system replace purge valve.
52000 mi US $1019	new transmission mount needed

76000 mi US $130

Oxygen sensors clogged. Replaced engine air filter. The one I had installed was too dense.

10000 mi

Engine light came on and stayed on.

40000 mi US $120

Check engine light, code P0455. "O" Ring on gas cap was misaligned. Once it was aligned, code cleared.

8000 mi

Replaced Air injection module.

70700 mi US $1200	Fuel mixture rich, determined two intake gaskets needed replacement
74000 mi	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.
82000 mi US $275	Replace muffler

12000 mi

Gear shift stuck. Upgraded to 2.0, lubed shifter.

3000 mi

Secondary air injection valve faulty. P0410

26800 mi

Muffler replacement

5000 mi

Computer upgrade.

71000 mi US $238

Failed crank position sensor. Car rendered totally useless.

16000 mi	Dealer replaced the secondary air injection valve.
85000 mi US $992	Alternator drive belt shredded which destroyed the oil pressure sending unit and an emission control line.

7000 mi

P0430 code shown on ScanGuage. Dealer replaced Secondary Air Injection Solenoid. P0410 code shown on ScanGauge. Dealer replaced Secondary Air Injection Solenoid.

4000 mi

Air injection valve replaced.

3000 mi

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.

3000 mi	Check engine light came on. Diagnosed as faulty switch over valve, which was replaced.
9000 mi	Needed a new fuel plug

4000 mi	The check engine light came on. Owner's manual said not to drive it. The problem was a bad switch over valve. Valve ordered.
8000 mi	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.
12000 mi	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.
28000 mi US $300	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.
52000 mi US $780	Secondary air pump replaced. Took car to shop when check engine light came on.

30200 mi US $25	gas cap cracked, got new one installed by self.
31600 mi US $400	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.
50000 mi	engine seized would have cost more than value of car to repair

27000 mi US $1544

faulty gas cap

55000 mi US $800	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.
89000 mi US $1400	Muffler failed. Secondary air injection pump replaced.

8000 mi	Smart 2.0 software upgrade - enhance transmission to work like the 2009 transmission.
22000 mi US $97	Water in gas

14000 mi

Intermittent clutch engagement problem. Did software update, and is OK so far.

5000 mi

Airflow valve was sticking. This has been a common problem with the Smart4two cars.

162200 mi US $3000

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 :(

127000 mi US $3000

oil leak

44000 mi

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.

66400 mi US $260

Flex tube between exhaust manifold and muffler broke. Had new piece welded in place of failed part.

87000 mi US $40

Clutch but didn't rrplace

10000 mi

Updated transmission to 09 computer flash, lubed gear shift knob.

60000 mi US $15	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.
137000 mi	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.

24000 mi US $100	secondary air injection valve stuck. Part replaced.
60000 mi US $520	air pump

100000 mi US $234	check engine light on. code = P049. sticky purge valve. replaced purge valve.
101000 mi US $139	check engine light came on. code=p0445-p0457. inspection of gas cap indicated gasket distorted. replaced gas cap.

46000 mi US $2600

replaced main computer and throttle body! replaced throtle body

2000 mi	OBD II code PO401. Faulty secondary air intake sensor.
2000 mi	Car towed to Riverside Smart dealer 06/28/08, returned 07/21/08, after replacing gas gauge float. Part delivery took over two weeks.
35000 mi US $150	Check Engine Light on. Engine fine---light bad.

100000 mi US $800

Noticed smell of gasoline and decreased range on full tank. Diagnosed as fuel pump. Took a week to get the part. Actual repair completed in an afternoon.

1400 mi

Check engine light...air sensor module failed

132800 mi US $169

Replaced exhaust Universal Flex pipe

23000 mi US $300

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.

48800 mi	Lower motor mount bolt became loose, caused a ckunking noise when car shifted gears. Tightened bolt.
56000 mi US $60	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.
69000 mi US $70	Secondary Air Pump - Bearings getting noisy. Replaced with a used unit from SpecializedGerman auto recyclers.

38700 mi US $160	Sensor replace to correct engine light from coming on and staying on
49700 mi US $379	check engine light fault code P0497 secondary air injection flow too low
38000 mi US $585	Also fuel cap gasket had a hole and engine sensor light was on and reset.

3000 mi	Engine rattle at low speeds.
4000 mi	Small oil leak.

9000 mi	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.
30000 mi US $485	OE exhaust broke at the 'flex joint' - unable to replair. Replaced with an aftermarket unit (an upgrade).

1000 mi

Engine stopped in middle of block while car running. No warning lights, was able to restart, dealer found nothing and was not willing to investigate further.