On the 2023 S on the build sheet states it's a ISG- Generation 2, with code of 94B. A 2022 build states ISG with 48V, with code of B01. Is the ISG for 2023 different than the 2022? If so why? Thanks

First generation = belt driven
Second generation = transmission-mounted


https://media.mercedes-benz.com/arti...f-cfe038e5c089

Second-generation ISG and further-developed 9G-TRONIC

The second generation of the integrated starter-generator is being launched in the E-Class models. The electric machine is no longer part of the engine but instead the transmission. This makes it easier to combine the innovative technology with different engines. Accordingly, the 9G-TRONIC automatic transmission has been further developed and will initially be used in the four-cylinder engines. The electric motor, power electronics and transmission cooler have moved to the transmission. As a result, previously necessary cables have been dispensed with, resulting in installation space and weight advantages. The efficiency of the transmission also increases. Example: the improved interaction with the electric auxiliary oil pump reduces the delivery volume of the mechanical pump by 30%. Further contributions to increased efficiency are made by the new generation of fully integrated transmission control with a multicore processor and a new assembly and connection technology. Despite increased computing power, the number of electrical interfaces has been drastically reduced and the weight of the transmission control unit reduced by 30%.


https://group-media.mercedes-benz.co...l?oid=29791975

Road #3: Diesel engines, petrol engines, ISG and RSG, 48 V on-board electrical system: High-efficiency internal combustion engines: everything old is new

Oct 9, 2017
StuttgartMercedes-Benz attaches key importance to the optimisation of modern, internal combustion engines in its road map to sustainable mobility. In particular, the economical, clean and, especially in Europe, highly popular diesel engine makes an important contribution to the further reduction of fleet consumption. 2017 saw the launch of a new range of petrol engines in the S-Class, which once again sets the benchmark in terms of efficiency. Electrification and the 48 V on-board electrical system have made possible the sort of fuel savings that until now were the exclusive domain of high-voltage hybrid technology. An important role in boosting the efficiency of internal combustion engines is played by the EQ Boost integrated starter generator that Mercedes-Benz has now introduced in series production, as the first manufacturer. Furthermore, belt-driven starter alternators will also be introduced in additional engine variants shortly. Meanwhile, something that has long been standard for diesel engines is now also coming being widely used in petrol engines: the particulate filter.