Mercedes Bosch ECU Misfire Repair for 0261 200 612 / 0261 200 614

A Mercedes ECU misfire repair is finished in the car, not at the bench. Our engineers repair the Bosch unit itself at our workshop, but the coil packs have to be changed before that ECU is refitted, and that change belongs to the job as well.

The sections below cover what testing decides, what is on record for each Bosch number named on this page, how a unit goes through our workshop, and the coil-pack instruction itself. The make page that collects Mercedes-Benz engine ECUs links this page with the rest of our Mercedes work.

What testing decides after a misfire

Customers send these Mercedes-Benz Bosch units to us when a misfire has led them to the ECU. A misfire does not, by itself, show that the ECU is at fault. Testing at our workshop establishes whether the unit has a fault and, if it does, what needs repairing.

No record on this page should be read as a diagnosis. A Bosch number and a Mercedes number on record for it identify a unit; they say nothing about its condition.

0261 200 612

Records for 0261 200 612 give the Mercedes number A 015 545 01 32.

A Mercedes-Benz C200 (W202) appears in records for 0261 200 612.

Listings name 0261 200 612 as a PMS unit.

If the Bosch number on your unit is 0261 200 612, the coil-pack instruction further down this page applies when we return it repaired.

0261 200 614

0261 200 614 is listed with the Mercedes number A 018 545 11 32.

Records for 0261 200 614 include a Mercedes-Benz C200 (W202).

Listings describe 0261 200 614 as a PMS unit.

We have written up a repair of our own on this number: a Bosch 0261 200 614 from a Mercedes-Benz C200 (W202), sent to us with a misfire on two cylinders and repaired at our workshop. Our write-up of that Bosch engine ECU job gives the details.

Should your unit’s Bosch number be 0261 200 614, the coil-pack instruction below applies to its repair as well.

How our engineers take a unit through repair

We work by post, taking units from anywhere in the UK. Each unit is logged when it arrives, inspected and tested electrically, then taken through diagnostics aimed at whatever fault the testing points to.

We then contact you with the outcome and a quote. No chargeable work begins until you have authorised it.

Repairs are made at component level, under a microscope and with temperature-controlled rework equipment. A repaired unit does not leave us until it has passed final testing.

Our engineers’ repair is backed for 24 months by a warranty that is specific to the work done; only the sender can claim on it.

Changing the coil packs ahead of refitting

Our bench work is the first part of the repair. The second happens at the car, before the ECU goes back in.

When we return a repaired Bosch 0261 200 612 or 0261 200 614, the coil packs must be changed before the repaired ECU is refitted. That applies even if the coil packs were changed recently.

Coil packs fitted while the faulty ECU was still connected may have been damaged. Refitting the repaired ECU without changing them risks damaging it again, and may void the repair warranty.

This condition is ours, attached to the repairs set out on this page.

We set it out here, before a unit is sent, so that whoever refits the ECU can plan the coil-pack change from the start.

Contact us for a quote through our Repair Form, set up for engine ECU jobs. For engine ECUs from other makes, see What We Repair, which profiles a number of engine ECU designs.