does M52 have an EGR valve?

hi all,

I've only posted on here once before so a warm hello!

I have a 1995 e36 M52 2.0. It's failed the MOT on the co2 level, which hovers around the 0.6 mark (the car was well warmed up for the test).

The engine has covered 167k, (I've had it since 90k), but previous MOT's (last year and year before) have seen the first fast idle test in this region, and the the co2 level has dropped before the 0.3 pass mark to o.12 or even 0.05 on the second, and the car has passed.

To give you an idea of the condition of the engine, in the last few months I've fitted a new cat, lambdas, serviced the injectors, changed the oil/filter/fuel filter/air filter. i changed the oil every 5k, and the compressions are good.

Seems to me a valve or something isn't opening. My mechanic friend put it on a diagnostic machine, which threw up an EGR or AGR code. But the car doesn't seem to have an EGR valve (it's a petrol engine).

If anyone has an idea of what could be causing the high c02 level your insight would be really appreciated. my mechanic seems to think that 0.5 is typical of a car of this age and mileage, but given the previous readings at 60k, and that it seems to be running rich suggests to me something is a miss, like it's running in closed loop mode or something