Idle control units
Faults in idle regulation, unstable engine running and problems caused by ageing electronics.
Repair and refurbishment of control units.
We specialize in electronics for classic Mercedes-Benz vehicles. We diagnose faults, refurbish damaged parts and bring original control units back to reliable operation.
Specialization
Electronics for cars that no longer belong in ordinary service.
We work with control units and modules used in older Mercedes-Benz models, especially from the 1980s. Each order is handled individually according to the fault symptoms, condition of the electronics and availability of parts.
What we can solve
- High or fluctuating idle speed
- Non-functional mixture richness control
- Unusual heater blower behavior
- Heating cannot be switched off, warm air keeps blowing
- Heater control buttons do not hold or do not return
- Climate control unit
1980s
Focused on classic Mercedes-Benz
Original Part
Repair instead of unnecessary replacement
Prague
Units can be sent by post
K-Jetronic / KE-Jetronic
Important note about mechanical injection
Mercedes-Benz vehicles from this era often use K-Jetronic and KE-Jetronic systems. These are Bosch mechanical-hydraulic continuous fuel injection systems, known for their reliability and used by many manufacturers in the 1970s and 1980s, including Mercedes-Benz.
We focus only on the electronic components of these systems, such as control units, idle regulation modules and related electronics. We do not repair complete vehicles or the mechanical part of the injection system.
If the injection system itself is not in good mechanical and hydraulic condition, repairing the electronic parts may not have a significant effect. For repair we therefore accept removed electronic components, not whole cars.
Repairs
What we can help you with
ECU units
Selected engine control units, with focus on keeping the original part in the vehicle.
Climate control units
Refurbishment of climate control units and related comfort-system electronics.
Heater valve
Refurbishment of heater valves affecting correct temperature control in the interior.
Warm-Up Regulator WUR
We refurbish WUR warm-up regulators for K-Jetronic and KE-Jetronic systems, affecting control pressure, mixture enrichment and cold-engine behavior.
We can also repair other electronic units.
If you have another module or electronic unit from an older Mercedes, send us the part number and fault symptoms. We will check whether we can repair or test it.
Idle control valves with the correct resistance.
We also supply idle control valves with resistance matching the original wiring, so the control unit can work correctly and reliably.
Process
A simple path from fault to repaired unit
Describe the issue
Send the vehicle model, year, unit number and how the fault appears.
We inspect the unit
After delivery we perform an initial check and suggest the repair scope.
We repair and test
After repair we check the unit again and prepare it for return shipping.
Contact
Send us a fault description.
Ideally include the Mercedes model, year, unit number and a brief description of the vehicle behavior. We will suggest the next step.
Phone: +420 246 033 225
Company: PROWAG s.r.o., Company ID 26781123, VAT ID CZ26781123
IBAN: CZ96 2010 0000 0026 0329 0472
BIC/SWIFT: FIOBCZPPXXX
Shipping address: Jižní III 32, 141 00 Prague, Czech Republic
Models: W123, W124, W126, R107 and other 1980s Mercedes-Benz vehicles
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