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Smartmods
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Clean Your Air Conditioning
Air conditioning removes water from the air, reducing humidity and allowing you to sweat to keep cool. It can also cool the air in summer.
450 Airbag Removal
Airbags are there to save lives, if any of them go off you should replace it before driving the vehicle again. Here is how.
451 DRL Options
Pre-Facelift DRLs The first type of daytime running lights available for the 451 was this type. They consist of a pair of Hella lights and surrounds. Smart part number A 451 820 00 61. However, if you buy them from smart, they'll be ridiculously expensive. So, do a...
HID Headlight Interference
Radio Interference After HID Installation This is a fairly normal occurrence. The radio signal is fine until you turn on the headlights. But as soon as the headlights are on, you get loads of static interference over the music. What Is It? Radio stations are...
453 Horn Upgrade
Like all previous smart models, the horn is an embarrassment. A single unit that's far too quiet. What we need is a pair of tone matched horns (high and low frequency). Remove the front panel to access the main horn. It's just below the offside headlight... ...hidden...
Wishbone Change Roadster
Hit something or had a little crash and bent the wishbone?
MB Star – Clutch Adjustment
Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up DAS. Press unlock on the key, place it into the ignition and turn it to position 1 to power the car up. When you get to the main screen, press F2. Press F2. Press F2. Scroll...
MB Star – Paddle Shift Coding
450 Fortwo's With A SAM Unit And All Roadsters Fit First Fit your paddleshift steering wheel and swap the connector over under the dash on the 450 and Roadster. There is no connector to swap for the 451. If it doesn't work after coding, check the wiring. Then Code...
PAS Controller Waterproofing
Problems Another thing that dies due to water ingress in the Roadster is the power steering controller. However, it also happens in the fortwo 450 although it's much less likely. The reason for the issue is the placement in the cars. This unit sits low in the footwell...
Brake Switch Test
The brake light switch failing is a common problem but other things can cause the same symptoms. Makes sense to test your switch before blindly replacing it.
MB Star – Rev Counter Coding
450 Fortwo's Only Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up DAS. Press unlock on the key, place it into the ignition and turn it to position 1 to power the car up. When you get to the main screen, press F2. Press F2....
MB Star – Steering Wheel Calibration
450 Fortwo With A SAM And All Roadsters Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up Xentry. Press unlock on the key, place it into the ignition and turn it to position 1 to power the car up. When you get to the main...
Glow Plug Controller Fault
Symptoms I have had the same email once or twice a year from 450 and 451 CDI owners. "My glow plug light doesn't go out" Normally I recommend replacing the glow plugs and checking the engine earth lead. Normally this fixes it. However, sometimes I get another...
MB Star – Baby Seat Coding
450 Fortwo With A SAM And All Roadsters So, you have fitted the fixing frame to the car and plugged it in. Time to code it in. Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up DAS. Press unlock on the key, place it into...
453 Relay Layout
Relay Layout Main Fuse Box (Behind Dashboard) F2 Relay Number Function Specification K1 Heated rear window & mirrors (G Cartier) 20 241 077 35 Amp max K2 Electric windows (G Cartier) 20 241 077 35 Amp max K3 Sliding roof power Not sure, should be the same as K4 I...
Roadster Speedo Dead
The speedo in the Roadster is beginning to suffer from a new common fault. Much like the rest of the Roadster, the speedo electrics are a weak point for a few reasons. Straight After A Battery Reconnect The story usually starts the same way. After reconnecting the...
Wishbone Change 451
If you have bent a wishbone in a crash or the bushes are failing, fit a new wishbone.
Roadster Indicator Faults
Roadster Indicator Faults It's surprisingly normal to hear Roadster owners come up against a strange issue along the lines of: 1 or both indicators come on and stay on when I indicate. 1 or both indicators come on and stay on when I turn the car on. 1 or both sides...
Fitting A Better Horn
The Horn The standard horn fitted to all smarts isn't loud enough. It doesn't draw attention like it should. In fact, it's almost laughable and many people say it's like a scooter horn. There's a reason for that. That's exactly what it is. A single low wattage disc...