Auto Electronix · Basingstoke bench · est. on the road ~20 yrs
Dead control module?
It's almost certainly repairable.
Engine ECUs, Mercedes ignition switches and steering locks, body modules, gearbox electronics, clusters and ABS pumps — repaired at component level on your original unit, so the coding and keys stay exactly as your car expects.
★ 280+ Google reviews Workshop + mobile, London & South East
// Service index
What comes across the bench
Eight specialist repair lines. If your fault is not on the list, call anyway — if it has wires, it is our kind of problem.
Engine ECU Repair
Component-level repair of your original engine control unit — usually far cheaper than a dealer replacement, with no coding headaches.
EZS / EIS Ignition
Key not turning? Key not recognised? The EZS/EIS electronic ignition is one of our longest-running specialities — repaired on the original unit, keys preserved.
ESL Steering Lock
The electronic steering lock is the most common reason a W204-era Mercedes goes completely dead with the key in. We repair it properly — motor, electronics and sync.
SAM / Body Modules
When lights, wipers, windows and indicators start misbehaving at random, the body control module is the usual suspect — and it is repairable.
TCM / Gearbox Modules
Gear selector stuck in park, gearbox in limp mode, or no drive at all — transmission control electronics fail predictably, and we repair them at board level.
Instrument Clusters
Dead displays, dropping gauges, missing pixels — the dashboard cluster is electronics like any other module, and most faults are repairable on the original unit.
ABS Pump Repair
ABS warning light on, pressure-sensor codes, or a pump module that has gone silent — most ABS electronics can be repaired on the original unit.
Mobile Diagnostics
Dealer-level diagnostic equipment, brought to your driveway — so the fault is found before any parts money is spent.
// Method
Diagnose → repair → bench test → warranty
The same discipline on every unit, whether it arrives by post or on four wheels.
- DiagnoseDealer-level diagnostics and board inspection find the actual fault — not the first code in the list.
- RepairComponent-level work on your original module, so coding, keys and adaptations survive.
- Bench testRepaired units are proven on the bench rig — powered, communicating and exercised under load — before they leave.
- WarrantyWork is covered by our workshop warranty; the terms are confirmed in writing on your quote.
// Rate card
Honest pricing, published where we can
Module repair pricing depends on the unit, so most jobs are quoted individually — these are the rates we can publish outright.
| ENGINE ECU REPAIR | from £150 typ. £190 |
| MOBILE DIAGNOSTIC | from £90 |
| 1-HR PRO PHONE SUPPORT | £120 |
| MERCEDES SBC, COMPLETE ON-CAR | from £650 |
| EVERYTHING ELSE | request a quote |
// Track record
Two decades on the bench, in numbers
Every figure above is checkable: the reviews are on our live Google profile — we do not curate, trim or invent them.
// Job log
From the workshop log
Real repairs and plain-English guides — the log goes back to 2016 bench work.
// Direct line
Talk to the bench, not a call centre
Call or WhatsApp John directly — describe the fault and get a straight answer on whether it is worth repairing, and what it will cost.