It's a fairly robust unit but they can go wrong.
Smartmods
for all your modding needs, recommended by Evilution
Kane Harrison
HDD To SSD Conversion
2023 Edit The original info on this page is probably in excess of a decade old and, because of software and hardware changes, it's out of date. The cost of SSDs is now 20% of what they cost back then so it's just easier to find a Chinese company that sells MB Star...
Head Gasket Failure Test
Symptoms Do you have oil in your coolant? Coolant in your oil? Losing coolant? Car running like a piece of shit? Good news, your head gasket might be screwed. The head gasket sits between the main block and the head. The main block holds the pistons. The head holds...
Head Up Display
Head Up Display or HUD can be found on fighter jets, attack helicopters and a very few cars, let's try and add a smart to that list.
Headlight Adjustment
If you remove the headlights or change the bulbs, the headlights may be out of alignment. They may be too low or dazzling drivers.
Headlight Eyebrows
Adding eyebrows to the headlights can give a the car a better look.
Headlight Polishing
Headlights suffer from corrosion, it's easy to sort out.
Headlight Scratch Repair
Plastic lenses have their advantages over glass lenses but they do get scratched through general wear and tear,stone chips, road grit etc.
Heated Seats – Retrofit
After working on this project with smart owner BlackDog, everything is now ready to go.
Heated Seats Not Working
The heated seats on the 450 and Roadster seem to have a few common faults that stop them working.
These faults haven't appeared on the 451 yet but if they do, these fixes should help too.
Heater Control Sliders
The heater controls are a bit boring and snap too easily.
Heaters
If you thought the smart had one heater, you'd be wrong.
Heavy/Stiff Steering
Getting to the bottom of stiff steering.
Hella 451 DRL Repair
The 5 per side Hella daytime running lights on the 451 where surprisingly poor quality and failed regularly.
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...
High Level Brake Light
Changing the bulbs in the high level brake light assembly.
Highline – What It Could Have Been
I have always wondered about the miriad of connections on the back of the Highline stereo.
Highline DVD Handbrake Bypass
The Bosch Highline stereo has a DVD player but it only works when the handbrake is on
Highline DVD Region Code
The software update added region code changing to the Bosch Highline stereo but it could only be changed 5 times.
Highline Firmware Files
Bosch Highline Firmware Update Below are the download links for the Bosch Highline stereo. You have 2 versions of the firmware, each one depends on the stereo version you have. The V1 was updated from V0815 to V0923 and the V2 was updated from V1208 to V1223. There...